Questions tagged [heartbeat]

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Why do semilunar valves not need tendinae but atrioventricular valves do?

Inside the heart the atrioventricular valves (AV) have chordae tendineae to prevent the backflow of blood into the atrium when the ventricle contracts. Since the AV and semilunar valves are ...
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0answers
21 views

What are the bio-molecular reasons that makes some people's hearts more reactive to adrenaline that they get palpitation when it rises?

Epinephrine, more commonly known as adrenaline, is a hormone secreted by the medulla of the adrenal glands. Strong emotions such as fear or anger cause epinephrine to be released into the ...
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0answers
18 views

Difference in heart muscle tissue growth (cardio vs low-rep intense weight lifting)

Below is a quote from a subreddit that says: I haven't kept up on the research, but the last thing I read back in college looked at weight lifters and long distance runners. Both types had larger ...
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1answer
56 views

Heart Sound Samples

Does anybody have helpful sources/links that are basically recordings and playbacks of heart sounds (normal/ abnormal/ etc.) that I could just listen to while in my spare time? I am looking for ...
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0answers
45 views

How wrist wearables count breaths?

I am doing a research about wrist wearables in order to understand how they work. They can be used to measure stress levels, just like pupillometry, skin conductance and other related measures can be. ...
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1answer
3k views

Does a cold or flu typically affect resting heart rate?

Background I have had a Fitbit heart tracker for several months. Typically, it reports my resting heart rate around 60 bpm, with a standard deviation of 1-2 bpm. A month ago, I got some kind of ...
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0answers
40 views

Why consciousness is lost immediately when heart stops beating?

When heart stops beating - consciousness is lost in seconds. It is explained that it is due to the drop of blood pressure in brain veins. However, by my understanding - that should only make brain ...
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2answers
335 views

Feel my heart beating even when resting, happened after drinking [closed]

I'm 15 years old and a male from Sweden. For the last 2 werks I've been starting to party and drink with my friends. But i have never gotten "drunk" more preferably "a bit happy". But for 3 days ago i ...
2
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0answers
132 views

How does the heart rate change during REM and non-REM stages?

I read different references and I understand that the average heart rate during sleep decreases by some beats per minute. The heart rate is slower in non-REM stage than REM but I found no measurements ...
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2answers
315 views

Is it possible for the lungs and heart to work independently of one another?

I understand that the lungs take in oxygen, pass it to the heart to send throughout the body, and receive CO2 from cellular respiration that the lungs then breathe out. (Oversimplified, I know, but ...
2
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0answers
816 views

Period between Heart lub-dup sound S1 and S2

Just curious not asking a professional opinion, Does anyone know the average time difference between S1 and S2 sounds of the heart the so called lub-dup sound? I believe its around 150 milliseconds. ...
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1answer
56 views

Why doctor wont put stethoscope stationary at one point?

Doctor so often changes stethoscope on body, Then how can he\she identify heart beat rate?
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1answer
43 views

Heartbeat pulse strength vs Alcohol

Recently the elevator got broken at my place and it's been a few days of using stairs. I live on the 5th floor. I noticed.. actually I didn't notice anything when going up and down the stairs during ...