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October 21, 2009
The heart it turns out is not merely muscles and blood; rather it is a hot wired organ, dependent on steady and unfailing electrical impulses to perform as an efficient pump.
In ventricular tachycardia, the hear beats far too fast and does not have enough time to fill its chambers with incoming blood before pumping. The heart ceases to deliver blood effectively to the lungs or throughout the body, and the result is vastly diminished blood pressure or a loss of consciousness.
Ventricular tachycardia may be followed by a second electrical disturbance known as ventricular fibrillation. Ventricular fibrillation is a chaotic rhythm in which the pumping chambers of the heart, the ventricles, cease to pump blood altogether. The result, unless treated within seconds, is fatal.
Ventricular tachycardia and fibrillation are deadly time bombs set randomly and silently. They are isolated electrical catastrophes that, in those prone to electrical malfunctions of the heart, may occur once a month, once a year, or never in the most fortunate. Yet, in those of us wired to explode, they are often undetectable. Moreover, some ventricular arrhythmias operate so quietly until they attack with a full frontal assault that for many, death-sudden and often untimely-caused by an arrhythmia is the first and only manifestation of a heart problem that they will ever have.
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