Depending on how the heart’s electrical activity appears on an EKG, a doctor may diagnose coarse or fine ventricular fibrillation (VF). Coarse VF appears as larger waves on an EKG compared with the ...

Malignant arrhythmias are dangerous heart rhythm problems that can lead to cardiac arrest, most often originating in the heart’s lower chambers. These arrhythmias are frequently linked to underlying ...

Perhaps the most rewarding aspect of watching 1-year-old Fletcher St. Jean toddling after his brothers and sisters is that he ...

Hypokalemia may lead to an irregular heartbeat, also known as arrhythmia. Some arrhythmias can be life threatening without treatment, but restoring potassium levels may help reverse symptoms alongside ...

Panel A shows a cross-section of a normal heart (top) and an endomyocardial biopsy sample from a normal heart (bottom; with hematoxylin and eosin staining) that shows normal histologic characteristics ...