<prompt> Most common sustained tachycardia in healthy young women is?AVNAVAtrial fibrillationPre-excitation syndrome  <response>: Most common sustained tachycardia in healthy young women is: AVNPSVT Option B: AV Atrioventricular Reentrant Tachycardia seen with pre excitation syndrome like WPW syndrome where there is abnormal conduction pathway in the hea. 