Seizures can disrupt the autonomic nervous system, potentially leading to cardiac arrhythmias, which are abnormal heart rhythms. Cardiac arrhythmias can cause convulsive syncope, a condition ...

An arrhythmia is an atypical heartbeat that is either much faster or slower than expected. Your heartbeat may be described as chaotic, rather than steady and predictable. There are several types of ...

A sinus arrhythmia refers to a problem with the sinus node of the heart. This controls the rhythm of the heart and can be fast (sinus tachycardia) or slow (sinus bradycardia). This article looks at ...

If you have bigeminy (bi-JEM-uh-nee), your heart doesn't beat in a normal pattern. After every routine beat, you have a beat that comes too early, or what's known as a premature ventricular ...

In adults, a typical resting heart rate is 60 to 100 beats per minute, but structural or electrical disorders of the heart can cause it to rise or fall. Medications, a lack of sleep, and stress may ...

THE time-honored drug armamentarium for cardiac arrhythmias of digitalis, quinidine and procainamide has proved successful in most clinical circumstances. Toxicity to each of these agents, however, ...

Cardiac doctors say that blows to the chest causing an erratic heart rhythm are highly unusual, but not unheard-of in sports. By Gina Kolata A freakish accident may explain the cause of the cardiac ...

Apple Watch Series 4 has two FDA-cleared heart features that can warn about life-threatening conditions. Here's what happened when I tested Apple's ECG against a medical-grade EKG. Vanessa is a lead ...