Tag Archives: Sinus tachycardia

Sinus Tachycardia Sinus tachycardia is a fast heartbeat. In sinus tachycardia, the heart beats more than 100 times a minute. Sinus tachycardia starts in the part of the heart called the sinoatrial (SA) node. Sinus tachycardia may be harmless, or it may be a sign of a serious condition. What are the causes? This condition […]