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<bold>Figure 33-46</bold> Electrocardiogram during conversion of supraventricular tachycardia to sinus rhythm with administration of adenosine. During tachycardia at a rate of 230 beats/min, there is a normal-appearing QRS complex without a delta wave (no ventricular preexcitation), and there is no distinct P wave. After conversion to sinus rhythm, there is a short PR interval (80 milliseconds) and wide up-sloping QRS complex (90 milliseconds) representing ventricular preexcitation, indicative of...
<bold>Figure 33-46</bold> Electrocardiogram during conversion of supraventricular tachycardia to sinus rhythm with administrat...