Skip to content
irol83 posted:
Have any of you with IST ever noticed how hungry you feel after things calm down?
cardiostarusa1 responded:

Just to clarify here for the masses, I assume you are referring to the condition known as inappropriate sinus tachycardia. I don't have this condition though.

Take care,


WebMD member (since 8/99)



As applicable to the patient

Inappropriate sinus tachycardia (IST)

A misunderstood cardiac arrhythmia

IST is a condition in which an individual's resting heart rate is abnormally high (greater than 100 beats per minute),......


Learn about the heart's delicate and precise electrical conduction system

Animated Tutorial

Heart Rhythm Society

Patinet and Public Information Center

_ . _

Calming the HEART

Techniques at Home (as applicable to the patient)

Tighten stomach muscles. As soon as the heart starts to race, tighten the stomach muscles. This will cause the abdominal muscles to put pressure on a group of nerves that will tell the heart's electrical coduction system to slow down.

Chill. Take a deep, long breath and slowly let it out. Sometimes relaxation is all it takes to stop tachycardia. And deep breathing is frequently one of the fastest ways to relax.

Use common sense. Anything that speeds up the heart, caffeine and cigarettes, for example, can trigger a rapid heartbeat. So common sense says that if one is prone to tachycardia, one should avoid any substance that might give the heart an extra kick.

_ . _
irol83 replied to cardiostarusa1's response:
Precisely. I just wondered if anyone else feels the same way after an episode.
cardiostarusa1 replied to irol83's response:
It will be interesting to hear some replies, especially since the true form of IST is not an episodic condition, as opposed to say, paroxsymal supraventricular tachycardia (PSVT), which typically causes a frightening burst/surge in heart/pulse rate that begins/starts and ends/stops suddenly (hence the term paroxsymal), which can last for just mere seconds or it can continue on for minutes to hours to days. SVT can send the heart into speeds up to 150-200 BPM, and sometimes, even as high as 300 BPM.

Take good care,





From FDA reports: Tachycardia and Excessive hunger hunger

Helpful Tips

Mediterranean DietGuest Expert
The Mediterranean diet has long been recognized as a booster of heart health. It is linked to lower risks of heart disease, stroke, ... More
Was this Helpful?
11 of 12 found this helpful

Expert Blog

The Heart Beat - James Beckerman, MD, FACC

Dr. James Beckerman shares how small, livable lifestyle changes can have a real impact on your risk of heart attack and stroke...Read More

Related Drug Reviews

  • Drug Name User Reviews

Report Problems With Your Medications to the FDA

FDAYou are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

For more information, visit the Duke Health General and Consultative Heart Care Center