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Certain endocrine disorders such as pheochromocytoma can also cause epinephrine release and can result in tachycardia independent of nervous system stimulation. Hyperthyroidism can also cause tachycardia. [15] The upper limit of normal rate for sinus tachycardia is thought to be 220 bpm minus age. [citation needed]
As with any other form of tachycardia (rapid heart beat), the underlying mechanism can be either the rapid discharge of an abnormal focus, the presence of a ring of cardiac tissue that gives rise to a circle movement , [1] or a triggered rapid rhythm due to other pathological circumstances (as would be the case with some drug toxicities, such ...
Transesophageal atrial stimulation can differentiate between atrial flutter, AV nodal reentrant tachycardia and orthodromic atrioventricular reentrant tachycardia. [25] It can also evaluate the risk in people with Wolff–Parkinson–White syndrome, as well as terminate supraventricular tachycardia caused by re-entry. [25]
"Abnormal heart rhythms such as Atrial Fibrillation, Supraventricular Tachycardia, Ventricular Fibrillation or Ventricular Tachycardia can also cause palpitations," Dr. Serwer explains. This ...
POTS symptoms can be caused by several things, but the underlying issue is that POTS patients' bodies have a harder time pushing blood back up toward their heart and brain after sitting or lying ...
The underlying causes of sudden cardiac arrest can result from cardiac and non-cardiac etiologies. The most common underlying causes are different, depending on the patient's age. Common cardiac causes include coronary artery disease, non-atherosclerotic coronary artery abnormalities, structural heart damage, and inherited arrhythmias. Common ...
Sinus tachycardia is a normal response to physical exercise or other stress, when the heart rate increases to meet the body's higher demand for energy and oxygen, but sinus tachycardia can also be caused by a health problem. [4] An elite athlete's heart recorded during a maximum effort workout maintaining over 180 bpm for 10 minutes.
Ventricular tachycardia (V-tach or VT) is a cardiovascular disorder in which fast heart rate occurs in the ventricles of the heart. [3] Although a few seconds of VT may not result in permanent problems, longer periods are dangerous; and multiple episodes over a short period of time are referred to as an electrical storm.