cardiovascular disorders
Reentrant Supraventricular Tachycardias (SVT) Including Wolff Parkinson White Syndrome
Symptoms and Signs of Reentrant SVTs
Most patients present during young adulthood or middle age. They typically have episodes of sudden-onset, sudden-offset, rapid, regular palpitations often associated with symptoms of hemodynamic compromise (eg, dyspnea, chest discomfort, light-headedness). Attacks may last only a few seconds or persist for several hours (rarely,>12 hours). Infants present with episodic breathlessness, lethargy, feeding problems, or rapid precordial pulsations. If the episode of tachycardia is protracted, infants may present with Heart failure . Examination is usually unremarkable except for a heart rate of 160 to 240 beats/minute. 