Examlex
Blood cells are formed in the bone marrow from the divisions of what long-lived progenitor cells?
QRS Complex
A series of waves in an electrocardiogram representing ventricular depolarization preceding the contraction of the heart ventricles.
Atrial Fibrillation
A heart rhythm disorder characterized by rapid and irregular beating of the upper chambers of the heart, known as atria.
Ventricular Fibrillation
A life-threatening heart rhythm that results in rapid, erratic electrical impulses from the ventricles, leading to inefficiency in blood circulation.
Premature Ventricular Contractions
Early heartbeats originating from the ventricles of the heart, experienced as a palpitation.
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