heart stops beating for 3 seconds

My heart stopped beating for 5-7 seconds - what does it mean ...
Dec 3, 2009 - A few nights ago, after dinner, I was sitting at my desk and my heart stopped beating. It didn't start again for 5-7 seconds. I've had minor heart ...

Heart stops for 2-3 seconds a sign of fitness or a sign of heart ...
Feb 3, 2009 - beating the meat. RE: Heart stops for 2-3 seconds a sign of fitness or a sign of heart problems 2/3/2009 5:11AM - in reply to Fit or in trouble ...

can your heart stop beating for a moment and then restart again ...
Nov 15, 2012 - It is possible that the heart may not beat for a few seconds, perhaps 3-4, when the heart rate is this low. But any more than 5 seconds is ...

The Night My Heart Stopped Beating | Chad Hayes, MD
Dec 30, 2014 - One day, cardiologist #3 decided to admit me to the hospital to test for a ... when I passed out, my heart stopped beating for about 13 seconds.

The Night My Heart Stopped Beating - Newsweek
Feb 11, 2015 - ... Hayes was revived after his heart stopped beating for 13 seconds. ... One day, cardiologist #3 decided to admit me to the hospital to test for a ...

PALPITATIONS - a patient's guide - Family Doctor
The heart beats in response to an electrical stimulus (a bit like the way a car engine ... You may have the feeling that your heart stops beating for a moment, and ...

My Heart just stopped, so scared right now!! - No More Panic
All of a sudden I noticed my heart stop beating. ... My heart will actually stop for a few seconds, then beat three or four times really fast, then ...

my heart stops beating for a second - Heart Rhythm - MedHelp
May 20, 2010 - This discussion is related to It feels like my heart stops for a second. ... 3 if you dont feel you have had the skips during any of the ECG so far ...

Heart stopped over 15 seconds during test - Heart Rhythm - MedHelp
I had a tilt table test and after 32 minutes my heart stopped for 23 seconds. ..... I am also a runner (since 2014) and have done three half marathons last year and ...

Heart Stops Beating — Netdoctor.co.uk
Apr 2, 2007 - I know that sounds crazy, but you don't really notice your heartbeat until it stops. Generally it is only for a few seconds, and then the beating ...

Why do I feel like my heart stops sometimes? | Zocdoc Answers
Any persistent symptoms involving the heart need to be checked out by a doct. ... be just standing there and it feels like my heart stops beating for a split second.

Why does my pulse stop for like 30 seconds - JustAnswer
The heart stopping for more than a few seconds at a time generally only happens ... felt dizzy and checked my pulse and there was no pulse for about 3 seconds.

Why do we collapse immediately when our heart stops beating? - Quora
I guess I entered this in the wrong box, hopefully this is correct now :) The sudden drop in blood pressure is what causes you to drop. Although the oxygen i...

What does it mean if your heart stops for a second then starts again ...
It means noting if heart stops beating for a second because it usually happens when we are ... In fact if heart stops beating for 3–4 sec it means noting but when it is stopped for 5 or more than 5 second then you should take care of yourself.

When dizzy spells mean your heart has stopped: Doctors thought Kitty ...
Jan 20, 2014 - The dizzy spells continued and, over the next three years, Kitty returned to her ... Instead, the heart keeps beating only thanks to cells in the ventricles stimulating a ... Other causes of first and second-degree heart block include ...

Coder Corner » Archivio Blog » The day my heart stopped beating
Oct 26, 2010 - A few seconds later the image and sound came back at once. ... and they told me my heart had stopped beating for 6 seconds. ... They took my blood 3 times, checked the blood pressure, the tension, the cholesterol, etc, etc.

When your heart stops beating, then what? | Columns ...
Oct 8, 2008 - As Parnia describes this, “When your heart stops beating, there is no ... And so what happens is that within about 10 seconds, brain activity ...

How Long Does Your Heart Have to Stop For Before You Can't Be ...
Nov 4, 2013 - The second thing to consider is, "What is the electrical function of the heart? ... happening within the heart to be able to get the heart beating on its own again. ... really fast), and PEA (anything that isn't one of the other three).

Heart Health: Heart can stop and start on its own - KTIV News 4 Sioux ...
Jun 20, 2012 - They again can have there heart not beating from 3 seconds up to 20 seconds and restart again. Most of us will pass out once the heart does ...

Feel like heart stops beating for a second. Hard to breath. What are the ...
Aug 19, 2012 - Sometimes it feels like my heart stops for like a second, and then starts again but very slowly and hard for about 2-3 beats, and then continues ...

Clinical death - Wikipedia, the free encyclopedia
Clinical death is the medical term for cessation of blood circulation and breathing, the two necessary criteria to sustain human and many other organisms' lives. It occurs when the heart stops beating in a regular rhythm, a condition called ... Measurable brain activity stops within 20 to 40 seconds. Irregular gasping may occur ...

Does your heart stop for an instant when you sneeze? | UAMSHealth
Jul 2, 2015 - However, the electrical activity of the heart does not stop during the sneeze. Cardiologist Dr. David ... The heart could hold in place for several seconds.” Even if it's possible ... September 14 @ 3:00 pm - 4:00 pm. Winthrop P.

When the Heart Stops Beating | Heart (Family Health) | US News
Jan 5, 2009 - When the Heart Stops Beating ... 5 (HealthDay News) -- Deanna Babcock's heart stopped beating on July ... Once it happens, seconds matter.

Sleep Apnea May Stop Your Heart - Medical Daily
Jun 11, 2013 - 3 Ways For Men To Live Just As Long As Women. The biological mystery of .... so dangerous to the heart. During eight hours of sleep, the affliction can stop a person from breathing for up to 40 times for 10 seconds or longer.

Binoy John Dr - WHAT HAPPENS WHEN THE HEART STOPS ...
WHAT HAPPENS WHEN THE HEART STOPS BEATING FOR 3 SECONDS? MRI COMPATIBLE PACEMAKER IMPLANTATION IN A PATIENT JUST 5 DAYS ...

Slow Heart Rate?. - Patient
Sep 23, 2015 - Year ago I was at cardiologist because fast heart beating, I do ECG, 24h ECG and ... to beat normal and again when I breath in they make stop and then ... Heart rate pauses less than 3 seconds are usually benign and called ...

Heart block - NHS Choices
There are three levels of heart block (see below), and usually only the most serious type ... If you have a heart block, your heart won't stop beating altogether – other ... In first-degree heart block, there's a split-second delay in the time it takes ...

*HEART KEEPS STOPPING! please help!* - Heart & Cardiovascular ...
The report says that it arrests for about 5 seconds each time, ... I also then get a pounding heart to compensate for the stop. .... A defibrillator is used to straighten out arrythmias and beating ... Thru the course of diagnosis while in ER and catheterization it was determined that I had 3 arteries 100% blocked, ...

Does your heart stop when you sneeze? (Everyday Mysteries: Fun ...
So where did the myth originate that your heart stops when you sneeze? The changing pressure in your chest due to sneezing also changes your blood flow, ...

Does Your Heart Really Stop When You Sneeze? - Live Science
Mar 21, 2010 - When you sneeze, your eyes close, your chest contracts and your lungs expel air, but your heart keeps beating. ... The idea that a sneeze stops your heart is up there with the ancient ... 3 Snortworthy Facts About Sneezes.

a guy stops his heartbeats for 29 seconds!!! - YouTube
... dlli radagret!/ کوریک تریه ی دلی خوی راده گریت/ trpay dlli radagret!barasti saira/stops his heart. ... a guy stops his ...

His heart stopped beating and he wasn't breathing. But he got a ...
Jun 28, 2016 - His heart stopped beating and he wasn't breathing. ... He finished the race in 6 minutes, 13 seconds, and was disturbed to discover later ... said later that Nace and three other doctors at the track reacted as if they had been ...

What Happens When We Die? - TIME
Sep 18, 2008 - Dr. Sam Parnia talks to TIME about his three-year study into the science of ... When your heart stops beating, there is no blood getting to your brain. And so what happens is that within about 10 sec., brain activity ceases —as ...

Joe Jackson, Father To Michael And Janet, Suffers Three Heart ... - Spin
Jul 27, 2015 - Joe's publicist tells TMZ, in the hospital Joe's heart stopped beating for 10 seconds but he was revived. Joe just had a pacemaker inserted and ...

When the heart stops beating | Physics Forums - The Fusion of ...
May 4, 2013 - From the moment a persons heart stops beating, stop functioning, ... May 6, 2013 #3 ... Once your heart stops (or becomes ineffective at pumping blood, as in ventricular fibrillation), you will pass out within a couple seconds.

Why does my heart skip a beat? - Heart Disease - HealthCentral.com
May 25, 2008 - Your heart may be beating so fast that you feel as though it is ... 3 years old. the heart dr read the report and said that everything was ... I feel my pulse while it's occurring...my heart beat stops for that second that it is fluttering.

Causes of Sudden Cardiac Arrest: Athletes and Others - WebMD
You collapse without warning. Your heart stops beating, and blood stops flowing to your brain and other organs. Within seconds, you stop breathing and have no ...

Heart Stopping moment | DailyStrength
Jul 7, 2011 - I was wondering if anyone else has their heart actually stop when they pass out? ... passed out 3 times and I think, by the way I feel, my heart only stopped once. ... I passed out during the tilt table test in less than 30 seconds though. ... In most cases with people who have NCS, the heart stops beating for a ...

Experiences - I felt my heart stop beating for a few seconds ...
Sep 14, 2014 - Experiences - I felt my heart stop beating for a few seconds ... We serve over 3 million readers per month, and have costs like all popular ...

How long can you live after your heart stops? | Reference.com
An individual can live approximately 3 to 6 minutes after the heart stops, according to HowStuffWorks and About.com. If the heart stops and the individual has not ...

Heart Attack or Sudden Cardiac Arrest: How Are They Different?
Unlike with sudden cardiac arrest, the heart usually does not stop beating during a heart ... Seconds later, a person loses consciousness and has no pulse. .... The American Heart Association is a qualified 501(c)(3) tax-exempt organization.

Heart Stops.. (pause) Then Restarts - fitness & sports - Soompi Forums
Jun 5, 2009 - The second I doze off, my heart feels like it stops and then thumps .... for at least 2 seconds before it starts beating like normal again.. which, ...

How Long a Person's Heart Has To Be Stopped Before Medics ...
Nov 4, 2013 - The second thing to consider is, “What is the electrical function of the heart? ... happening within the heart to be able to get the heart beating on its own again. ... really fast), and PEA (anything that isn't one of the other three).

What are Ectopic heartbeats? - News Medical
You may feel like your heart has momentarily stopped altogether, or that it has skipped a beat. ... (3). Ectopic beats are commonly felt when you are lying in bed. This is partly .... My heart stops beating for several seconds with no warning.

Articles about Apnea - tribunedigital-sunsentinel
My friend, who has sleep apnea, says her heart stops beating during sleep. ... V.D. Dear V.D.: Sleep apnea consists of a series of 10- to 60-second breath-holding spells that occur throughout the night. ... By Sean Caples, February 3, 2010.

If your heart suddenly stopped beating, how long would it take for you ...
Sep 24, 2015 - If your heart suddenly stopped beating, how long would it take for you to die ... to my sister and me, which would've taken about two or three minutes, and ..... you will lose consciousness immediately or within very few seconds.

Data in Medicine: Collection, Processing and Presentation: A ...
... of the time constant R. Cwhich is of the order of 3 seconds in normal subjects. This means that if the heart stops beating, as is possible in stress situations, after ...

Sudden Cardiac Arrest: Get Life-Saving Facts - MedicineNet
Jun 8, 2015 - This pumps blood through the heart valves and into all the organs of the body so that they ... Less commonly, the heart can just stop beating.

Do you still live after your heart stopped beating? - Frihost
I personnaly think that it takes about 30 sec before you die. What you feel ... When your heart stops beating, you live until your brain dies from lack of oxygen (which doesn't take long). ... He was revived after 3 hours of stablizing proceedures.

Heart flutters scaring the shit out of me [Archive] - Bluelight
... docs have called them palpitations, where it feels like my heart stops for a second, ... its wierd because i my hate rate while i was on opiates the past 3 years was ... understand ..because when i would go lay down my heart would be beating ...

Amanda Holden tells how her heart stopped beating for 40 seconds ...
Feb 26, 2012 - The Britain's Got Talent judge was in intensive care for three days after giving birth to her second child.

biology - Does your heart stop beating when you sneeze? - Skeptics ...
Oddthinking♢. 74.2k13307412. asked Sep 14 '11 at 8:36. BaGi. 6093922 ... So where did the myth originate that your heart stops when you sneeze?

Amanda Holden: My heart stopped beating for 40 seconds after ...
Feb 26, 2012 - Amanda Holden: My heart stopped beating for 40 seconds after ... Chloe Moretz and Brooklyn Beckham split after three months together.

I Feel As If My Heart Stops Beating For A Few Seconds Idk Its Kind Of ...
What U R feeling is-: -a natural phenomenon. U feel Ur pulse in Ur arms because Ur HR is higher due 2 exercise & Ur muscles want oxygen,hence the feeling.

When the Heart Stops Beating - The University of Chicago Medicine
Within minutes of sudden cardiac arrest, blood stops flowing to the patient's brain. ... second is preventing damage to heart and brain cells when blood .... Page 3 ...

Can Yogis Stop Their Heart? | - Skeptic Meditations
May 17, 2015 - This post explores heart-stopping claims of yogis, in three parts: ... markedly “stopped” or significantly slowed the heart for a few seconds. .... Stopping the heart from beating is a mythic yogic claim that should be able to be ...

6 Ways to Instantly Stop Heart Palpitations | Life Off Beat
Sep 19, 2011 - Have you ever had heart palpitations that come every few seconds and ... up to, nearly 3 seconds, usually 2 seconds at the same frequency as the ..... Is it bad to do cardio exersizes if your heart is beating faster than normal?

When Your Heart Stops Beating Cover » Free MP3 Songs Download ...
44 When Your Heart Stops Beating Dc Drum Cover mp3. Bitrate: 192 Kbps File Size: 5.17 MB Song Duration: 3 min 46 sec Added to Favorite: 140.83 K+.

6 Ways Your Heart Can Get Out of Rhythm | Everyday Health
Jul 6, 2016 - Your heart relies on electrical impulses to keep it beating at a steady pace. ... 3. Ventricular Fibrillation. Ventricular fibrillation is the most deadly type of ... or an implanted defibrillator that will shock the heart if it stops beating.

How long does it take a person to die after heart stops beating ...
These are several questions regarding experiencing death. From what I understand it only takes about 10-20 seconds after the heart stops ...

heart skips - Heart conditions - Condition | Our Health
Mar 21, 2006 - It felt like my heart had stopped and I gasped for air, all happened within a few ... like your heart stops and then you have pain all in the matter of seconds and then .... I have 3 sick old dogs now and my heart has been beating ...

Do You Need a Heart Pacemaker? | Dr. Stephen Sinatra
A colleague told me her 72-year-old dad was getting a heart pacemaker. ... Anyone with heartbeat pauses of 3 seconds or more should be evaluated for a heart ...

Feels Like My Heart Stops, I Jolt Awake. Extremely Terrifying | My ...
I get this weird feeling like my heart is stopping or has stopped for a second, and I ... This consistently happens every minute for about 2-3 hours before I ..... my heart stop beating after exhaustion and the free falling jolt might not come this time.

How to Stop Heart Palpitations- Causes, Diagnosis, Tips and ...
3. How the Heart Works 4. Are Heart Palpitations Dangerous? 5. What to Tell Your ... by a feeling that your heart is beating too quickly, slowly, forcefully, or irregularly. ... They may last for a few seconds, several minutes or hours, or even days.

Can someone please help me I'm so scared for my life im a 16 year ...
Aug 18, 2014 - ... ago I had my first panic attack I couldn't breathe my heart was racing I... ... heart stop for a second skip a best then right after it started beating fast so ..... 3. DO NOT resort to medications. If you already have, try to get off them.

What To Do When Your Pet Stops Breathing or Heart Stops Beating ...
Apr 28, 2016 - What To Do When Your Pet Stops Breathing or Heart Stops Beating ... Keep this up about every 5-10 seconds until he is able to get to a vet. ... Rate: 1 2 3 4 5. PreviousWhat To Do If You Find An Abandoned Litter of Kittens.

Heart beat feeling like it is pounding very hard...feeling and ...
Again, I thought my heart had stopped and it was all over. After a few seconds of still being alive, I realized my heart was still beating, but ...

Feels like my heart stopped...very afraid!!! - Heart Disorders Message ...
Jan 21, 2002 - It lasts for about 5 seconds then beats normally. ... Im assuming this is just your heart beating irregular, speeding up and slowing down ... Then about 2-3 yrs ago I started w/ the PVC's (which scare the hell out of me @ times!) ...

Edinburgh Medical Journal
In addition to the heart-block, there must, therefore, be a second causal factor. ... during which the heart stops beating will be a simple multiple of the duration of ... could be reduced in frequency from 261 to 17'1 per minute, ale. a ratio of 3:2, or ...

When dizzy spells mean your heart has stopped | Vestibular Disorders ...
Jan 21, 2014 - Doctors thought Kitty was too young and fit to have a heart problem. ... 'Then, within no more than ten seconds, I'd jolt back to normal, so people never noticed. ... The dizzy spells continued and, over the next three years, Kitty returned to ... Instead, the heart keeps beating only thanks to cells in the ventricles ...

The First Few Minutes After Death | Popular Science
Oct 31, 2008 - A three-year study will explore the nature of death and consciousness. By Sam ... Second, during cardiac arrest, there is no measurable brain activity. ... "We sometimes think that, obviously, when your heart stops beating, your ...

Does consciousness continue after death? | LifeTrainings
When the heart stops beating no blood gets to your brain, and after about 10 seconds brain activity ceases. That is normally the official death point. Yet around ...

What to do if Breathing Stops - Kanpur Dehat
If breathing stops, then within three or four minutes the heart will fail .... It only takes a few seconds to examine a person to find whether the heart. B. Talk to ... are confronted with someone whose heart stops beating you must tryyour very best to ...

Heart palpitations - IrishHealth
I have tachacardia for 3 years.cannot touch full cream milk. ..... 4 to 5 seconds is an awfully long time for your heart to stop beating for, and although i truly believe ...

Acts 17: British Study Points to Life after Death
Oct 8, 2014 - Despite being unconscious and 'dead' for three minutes, the ... We're talking about what happens when the heart stops beating, not about ... As the article states, brain activity continues for 20-30 seconds after the heart stops.

Experience: I died for 20 minutes | Life and style | The Guardian
Oct 3, 2009 - 'Twice my heart briefly started pumping, then stopped': Eddie ... In the ambulance they administered several electric shocks – on about the eighth attempt my heart started beating again. ... My first thought in my second life was of the unlived life: countless ... Once out of hospital, I had to rest for three months.

How does lethal injection work? » Scienceline
Nov 12, 2007 - The first of the three injections is an anesthetic, sodium thiopental, ... The state of unconsciousness can be reached in as little as 30 seconds. ... to death (pronounced after the heart stops beating for a certain amount of time).

Fundamental Nursing - Page 161 - Google Books Result
This is done in cases where a person stops breathing (respiratory arrest) and the heart stops beating ... Give a breath every 3 seconds if a pulse is present.

Full Interview (Part 3) - HODS
[11 minutes 3 seconds]. Now let's talk ... Because once the heart stops beating, then when the airation stops to the organs then the organs die. So there is no ...

Absences & Pauses During Heart Rate | LIVESTRONG.COM
Aug 16, 2013 - Your heart rate is a good indicator of the strength of your heart. ... of beats in 10 seconds, and multiply this number by six to get your heart rate.

Heart Restart – Sudden Cardiac Arrest - Illinois Heart Rescue
Sudden Cardiac Arrest (SCA) occurs when the heart stops beating, abruptly and without ... In fact, SCA claims one life every 90 seconds, taking more lives each year than ... Yet there is wide variation across the country: 3% in Chicago, 15% in ...

How Long Does it Take for a Choke to Kill? | MMAjunkie.com MMA Forums
As Warwand says, it can take as little as about 3 seconds for someone to ... and run the risk of damage to the heart, which could stop beating.

Heart Palpitations - My Doctor Online - Kaiser Permanente
Symptoms of heart palpitations may include a passing sensation of a pounding, ... Most people report that they feel as if the heart stopped for a second, then started .... or (3) a mental disorder that manifests itself by acute symptoms of sufficient ...

My heart stops beating again and again lyrics
5 SECONDS OF SUMMER LYRICS - Daylight Knowing what you ... My heart stopped beating [Verse 3:] Oh I wish I could do it over over again. Cus maybe I'd do ...

The night my heart stopped beating - The Washington Post
Feb 22, 2016 - 3 decided to admit me to the hospital to test for a heart rhythm ... Apparently, when I passed out, my heart stopped beating for about 13 seconds.

A Last-Second Surge of Brain Activity Could Explain Near-Death ...
Aug 12, 2013 - ... can continue for 30 seconds after the heart stops beating—perhaps .... My near death experience a around age 3-31/2 leads me to believe ...

The Science Behind It: Why Hearts Continue to Beat after Death
Mar 9, 2011 - Check out this video of a turtle's heart beating outside the body: ... Interesting fact: Doctors define death as the point where the heart stops beating. ... Conciousness is lost within three seconds, and brain activity within 20-40.

Man resuscitated three minutes after his heart stopped beating: Doctor ...
May 30, 2016 - A 41-year-old man, whose heart had stopped beating for three ... Have played under worse conditions; no Akhtar in WI: Dhoni on second T20.

epilepsy | pathology | Britannica.com
On recovery from the seizure, which usually lasts from one to three minutes, the ... In some cases the heart may stop beating for several seconds, a condition ...

Cardiac Arrest | AED Authority® |
Cardiopulmonary resuscitation (CPR) will not restart a heart in sudden cardiac arrest. ... unexpectedly the heart stops beating due to a malfunction in the heart's electrical system. ... But all of this happens quickly – in a matter of seconds. ... When SCA occurs, the AHA recommends defibrillation within 3-5 minutes, or sooner.

Near-Drowning Facts, information, pictures | Encyclopedia.com ...
Within three minutes of submersion, most people are unconscious, and within ... occur in near-drowning cases, and the heart may stop pumping (cardiac arrest). ... Drowning is the second leading cause of injury-related deaths in children ages ..... in those whose brains have become coolest before the heart stops beating.

Cardiopulmonary Resuscitation (CPR) for Infants - Nationwide ...
What Happens if a Baby Stops Breathing or the Heart Stops Beating. If a baby stops breathing, ... no more than 10 seconds (See page 3, Step 1). 5. If baby is not ...

sleep attacks!! panic/death sensations whilst drifting off ...
... to sleep,il wake up after 5/10 seconds of sleeping and have a crazy .... with the feeling as if my heart had stopped beating for a short time. It scared the heck out of me. I had that feeling about 3-4 more times that night in about a 2 hour span. I was scared to fall asleep, afraid that my heart would stop and I ...

Scientists 'confirm' life after death exists with ground-breaking study
Aug 14, 2016 - ... heart has stopped beating. Remains of person. Getty Images. 3 ... 30 seconds after the heart stopped pumping blood around the body, and ...

Kids Sleep Disorders - Awareness
The 3 Types of Sleep Apnea Adult's Sleep Apnea Statistics ... of breathing, where breathing stops and begins again automatically after a few seconds, as well ... A drop in the baby's heart rate will sound an alarm, and a nurse can stimulate the ...

Types of Heart Attacks - SecondsCount.org
Sep 12, 2015 - Types of Heart Attacks. ... In cardiac arrest, a person's heart stops beating. Cardiac arrest is not the ... Seconds count in treating both heart attack and cardiac arrest. ... More HeartSmarts for You... 12345. 1-10 of 44 results ...

Effects of Altered Heart Rate on Chloroform - Circulation Research
Inflow to the heart was stopped for not more ... When spontaneous beating re- ... SECONDS. FIGURE 3. Effect on ventricular tachycardia of vagal stimulation.

Heart Rate Tidbits - ExRx.net
A heart rate of less than 60 BPM is known as bradycardia and this condition can ... obtained during exercise, it is acceptable to stop exercising and immediately take a pulse. Since post exercise heart rate decreases rapidly, a 6 or 10 second pulse ... At submax work intensity, it may take about 3 minutes before the heart rate ...

Meet 'Lazarus tot' whose heart stopped for 1 hour - today > news ...
Sep 17, 2010 - Meet 'Lazarus tot' whose heart stopped for 1 hour ... after nearly an hour, doctors finally got gore's heart beating again. but by the time he ... i had bathed all three, and put his pajama shirt on and maybe walked back in to .... drowning is the second leading cause of accidental injury-related death in children.

CPR/AED for Professional Rescuers and Health Care Providers
Preventing the Spread of Bloodborne Pathogens ______ 3 .... heart has stopped beating. Agonal ..... Until the chest clearly rises (about 1 second per ventilation).