Question

The width of the QRS in a patient presenting with tachycardia is 0.16 seconds. Each QRS complex has a visible P wave. How would you classify this tachycardia?

Answer 1

The tachycardia can be classified as supraventricular tachycardia (SVT), specifically atrioventricular reentrant tachycardia (AVRT). SVT with AVRT typically has a narrow QRS complex (<0.12 seconds), however, in some cases, it can broaden to >0.12 seconds. The visible P wave suggests that the tachycardia originates above the ventricles, in the atria or the atrioventricular node.

Step-by-step explanation:

Based on the information provided, the tachycardia can be classified as supraventricular tachycardia (SVT), specifically atrioventricular reentrant tachycardia (AVRT). In AVRT, there is an abnormal electrical pathway between the atria and ventricles, causing rapid heart rates. SVT with AVRT typically has a narrow QRS complex (<0.12 seconds), however, in some cases, it can broaden to >0.12 seconds.

The fact that each QRS complex has a visible P wave suggests that the tachycardia originates above the ventricles, in the atria or the atrioventricular node.

To confirm the diagnosis and determine the appropriate management, further evaluation and consultation with a medical professional, such as a cardiologist, is recommended.