What medical condition is indicated by "supraventricular tachycardia"?

• A. Heart murmur
• B. Abnormal heart rhythm
• C. Blood clot in lung
• D. COPD

Answer: (B)

Supraventricular tachycardia (SVT) is characterized by an abnormal heart rhythm originating above the ventricles, primarily from rapid electrical impulses in the atria or the AV node. In essence, SVT causes the heart to beat significantly faster than normal, often exceeding 100 beats per minute, which can lead to symptoms such as palpitations, dizziness, or shortness of breath. This condition is a clear example of an abnormal heart rhythm, distinguishing it from other cardiovascular issues.

The other conditions listed do not accurately describe SVT. A heart murmur refers to unusual sounds during the heartbeat caused by turbulent blood flow, but it does not signify a rapid or abnormal rhythm. A blood clot in the lung, or pulmonary embolism, is a different acute condition related to circulation that does not directly relate to the heart's rhythm itself. Chronic Obstructive Pulmonary Disease (COPD) is a lung condition that affects breathing but is not classified as an abnormal rhythm of the heart. Therefore, identifying SVT correctly as an abnormal heart rhythm is vital in differentiating it from these other conditions.