Questions tagged [cardiology]

the branch of medicine that deals with diseases and abnormalities of the heart.

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Mechanisms that causes prominent veins during physical exercise

I have just read this article about why veins become prominent while exercising: Why do veins pop out when exercising, and is that good or bad? I have some questions about this: The article ...
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40 y/o woman admitted with ARDS but normal values

Second year medical student asking: A 40 year old woman is admitted to the ICU with acute respiratory distress syndrome due to a life threatening case of pneumonia. Her respiratory values are as ...
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What natural supplements exist to lower LDL cholesterol and raise HDL cholesterol?

The doctor told me to use Niacin or Red Yeast to reduce cholesterol. Examine.com, which seems to be pretty legit, seems to support using Garlic as a natural alternative. What supplements exist with ...
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3 votes
1 answer
101 views

Is heart rate indicative of sleep phase?

Lately I've been using an alarm clock that determines what phase of sleep you are in (light or deep) so that it waits until you are at a lighter sleep phase before waking you up. It does this by ...
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Bulbus aortae is a part of aortic root, then where are the two measurements taken?

I would like to clarify my understanding because anatomy atlases do not provide me an explanation. As far as I know, the aortic bulbus is a part (the widest, the sinuses of Valsalva) of the aortic ...
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Why can't JVP be measured in a standing or supine position?

While carrying out the jugular venous pressure (JVP) examination, the patient is kept at a 45 degree angle with respect to the ground. Why can't it be measured in a standing or supine position?
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Should people with tachycardia avoid choline supplements?

After doing some brief research online it appears choline can have an effect on the electrical system of the heart, there are several medical papers online that discuss this topic, however I'm not ...
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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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What heart condition(s) cause tingling and lightheadedness that are NOT caught by an ECG?

Please note: A lot of things cause tingling in the face + extremities ("neuropathy") as well as lightheadedness, but in this question, I'm only interested in potential heart conditions, or anything ...
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1 vote
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142 views

Effect of wearing face masks on results of cardiac stress test?

In a simple cardiac stress test the subject is challenged on an inclining treadmill while being monitored visually and via EKG and a blood pressure cuff. This (or any) exercise requires breathing much ...
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Cardiac events/Myocardial infarction from 1 clinic or 1 large city daily data

Requesting help in finding a DAILY data about cardiac events/myocardial infarction from 1 clinic or 1 large city, i.e. day by day number of events for at least a month. It is very easy to find this ...
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Why in Brockenbrough-Braunwald-Morrow there is a paradoxical decrease in arterial pulse pressure?

The article here tells that in HCM due to ventricular premature contraction there is enough time for dilatation of ventricular filling which increases end diastolic volume thereby increasing ...
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How to differentiate Split S2 from Mitral valve prolapse murmur?

If history is not available or doesn't gives a clue about the pathology, is it still possible to tell whether it is MVP or Split S2 due to pulmonary valve problems? Both split S2 and MVP's murmur( the ...
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Why do changes in Effective Refractory Period in Response to Antiarrhytmics occur and how do they help in treating the arrhythmia?

I am having trouble understanding two related concepts. First, why changes in ERP occur when there is the administration of certain antiarrhythmics (eg: Class IC). A neat explanation that I have ...
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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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Consistently high WBC, normal CRP in a post-cardiac arrest patient

A patient had an elective coronary angioplasty which showed 80% blocked LAD. A stent was placed. She was stable and sent home. The next day she felt unwell and collapsed with LOC for a few seconds. ...
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Big difference between waking and resting heart rate

I recently got an Apple Watch and am using the HeartWatch app. I'm concerned because my sedentary heart rate is pretty high - it's about 85 bpm with frequent spikes to 100, but my waking heart rate is ...
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A medical notation which i could not understand

My doctor (a cardiologist) always writes this in his prescription after checking his patients: A.C.J.U.NV.NJ.O. Please note all the dots will be superscripts. What does this mean?
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What is the significance of the right lower node in a 12-lead electrocardiogram placement?

Given this EKG limb leads image, I noticed that the function of the right leg node in a 12-lead ecg/ekg is missing. In an actual placement I know this is present. So I need to ask, what is the ...
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50 views

Baby with ASD VSD PDA altogether

If a baby has ASD VSD and PDA altogether, than what are the chances for his self-recovery without any heart surgery. Also how soon would you expect such a recovery? What are the things you would ...
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Tight upper back when running on a treadmill

When I go to the Gym and do running on a treadmill I get a tightness across my upper back when I run at 9km/h or more. It's worth noting that I have asthma and use the Brown preventer inhaler and the ...
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21 views

Why does Atropine help to stop Paroxysmal Ventricular Ahrrythmias?

Why does Atropine help to stop Paroxysmal Ventricular Ahrrythmias? Can this be explained in context to the heart's anatomy?
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Why is there a left ventricular volume overload in patients with Ventricular septal defect?

With VSD left to right shunt in systole logically should dilate right ventricle due to volume overload since left side pressure is higher then the right.
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What happens to cations after depolarization/repolarization in cardiac muscle?

In the depolarization/repolarization of the cardiac cell cations such as sodium, calcium, and potassium flow in and out of the cell creating an action potential. My question is what happens to these ...
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Cardiopulmonary capacity assessment

Is it possible to determine someone's cardiopulmonary capacity from organ/tissue/blood samples alone? No other clues allowed. Think about a non cooperative patient, who can lie in an anamnesis, or ...
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What is the best diagnotic technique to detect inflammatory heart diseases (ECG and Echocardiography vs NMR)?

I was wondering what is the best diagnostic technique to detect inflammatory disease of heart and I would like to confirm if my reasoning is right. First of all, heart inflammation can cause abnormal ...
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Why does LDH-1 peak later than CK-MB in acute myocardial infarction?

As a marker of AMI, different enzymes are used. Creatine Kinase-MB peaks within 24 hrs and returns to normal relatively quickly. Where as LDH-1 peak appears later (~72 hrs) and stays high for a week. ...
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