Stuffy nose that won’t unblock, face feeling heavy like a brick, headaches that keep coming back; when sinus infections refuse to clear up for weeks, it’s time to consider hidden causes ...

If paroxysmal SVT is seen, carotid sinus massage, Valsalva manoeuver or facial dunking in an ice bath should be completed while recording the ECG to determine if the rhythm terminates (suggestive of ...

SVT vs. sinus tachycardia: Key ECG differences explained Learn how to differentiate supraventricular tachycardia from sinus tachycardia on ECGs by examining P wave visibility, heart rate, and ...

A map of the universe in gravitational waves could reveal "hidden" black holes, supermassive black hole collisions, and the large-scale structure of the cosmos.

Inappropriate sinus tachycardia (IST) is a condition that causes an abnormally high resting heart rate. WebMD explains the causes, symptoms, and treatment of IST.

The sinus P-wave is an attractive proposition as it is more readily accessible; accurate assessment of the tachycardia P-wave is at times challenging. To date, analysis of the sinus rhythm P-wave has ...

"Careful recognition of a concealed sinus P wave in ventricular tachycardia may be attributed to differential diagnosis." Immediate placement of an implantable cardioverter defibrillator is not ...

Hyperthyroidism may lead to tachycardia. Learn more about why this happens and how doctors diagnose and treat the conditions.

Tachycardia and bradycardia are two types of irregular heart rates. Learn more about their symptoms, causes, and treatment options here.

Background: Widely split P waves in sinus rhythm have been reported previously. However, widely split P' waves in focal atrial tachycardia (AT) on a surface electrocardiogram (ECG) have rarely been ...