Clinical manifestations and prevalence of different types of supraventricular tachycardia among Chinese.
Sixty-nine cases of paroxysmal supraventricular tachycardia (PSVT) were submitted to electrophysiological studies. The prevalence of different types of PSVT is as follows: 49% of the cases had atrioventricular reentry tachycardia (AV-RT), 14.5% atrioventricular nodal reentry tachycardia (AVN-RT), 28% AV + AVN - RT, and 8.5% other types. Altogether 77% in this group had atrioventricular accessory pathway, of which half are concealed pathway. Electrocardiographic characteristics during tachycardia give hints to diagnosis: (1) AV - RT has the fastest heart rate, with 62% 200 BPM or more, and 82% more than 188 BPM; (2) retrograde P waves can be detected in 64% of cases with AV bypass; (3) 50% of AV - RT shows QRS of bundle branch block pattern. Since accessory pathways are present in the majority of PSVT patients in China, the importance of treatment is stressed.
Wan
Q
Q
Department of Medicine, PUMC Hospital, Chinese Academy of Medical Sciences, Beijing.
Wu
N
N
Fan
W
W
Tang
Y Y
YY
Jin
L
L
Fang
Q
Q
D002681:China / Q000453:epidemiology; D004562:Electrocardiography; D006339:Heart Rate; D006801:Humans; D015995:Prevalence; D013611:Tachycardia, Atrioventricular Nodal Reentry / Q000453:epidemiology / Q000503:physiopathology; D013617:Tachycardia, Supraventricular / Q000145:classification* / Q000453:epidemiology / Q000503:physiopathology