Q: I was feeling lightheaded and having palpitations, went to the ER and was admitted to the ICU. They said I had a run of ventricular tachycardia. What is this?A: The heartbeat is controlled by electrical signals (giving rise to those “blips” on an electrocardiogram (ECG)) that tell the heart cells when they should squeeze, and coordinates the opening/closing of the heart’s valves. Normally the electrical signal begins in the sinoatrial (SA) node by the top of the […] » Read More
What’s Up Doc column: What is ventricular tachycardia?
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