Prenatal diagnosis of polymorphic ventricular tachycardia using 64-channel magnetocardiography.
We describe polymorphic ventricular tachycardia (VT) diagnosed using fetal magnetocardiography (FMCG). The fetus of a 33-year-old Japanese female at 24 weeks of pregnancy was diagnosed as bradycardia (60 beats/min) by fetal cardiotocography (CTG). Ultrasound findings indicated a diagnosis of an atrioventricular (AV) block involving extrasystole, but FMCG revealed a polymorphic VT followed by ventricular asystole. Standard ECG immediately after cesarean section at 37 weeks of pregnancy confirmed long QT syndrome followed by nonsustained polymorphic VT and an advanced AV block with wide QRS. Echocardiography demonstrated moderate left ventricular dysfunction in the neonate requiring implantation with a permanent pacemaker.
Department of Obstetrics and Gynecology, School of Medicine, Iwate Medical University, Uchimaru, Morioka, Iwate 020-8505, Japan. akimunef@iwate-med.ac.jp
Akimune
A
Fukushima
Kenji
K
Nakai
Atsushi
A
Matsumoto
Janette
J
Strasburger
Toru
T
Sugiyama
D000328:Adult; D054537:Atrioventricular Block / Q000175:diagnosis / Q000196:embryology; D002304:Cardiac Pacing, Artificial; D015148:Cardiotocography; D002585:Cesarean Section; D005260:Female; D005865:Gestational Age; D006801:Humans; D008133:Long QT Syndrome / Q000175:diagnosis / Q000196:embryology; D053798:Magnetocardiography; D010138:Pacemaker, Artificial; D011237:Predictive Value of Tests; D011247:Pregnancy; D011296:Prenatal Diagnosis / Q000379:methods*; D017180:Tachycardia, Ventricular / Q000175:diagnosis* / Q000196:embryology / Q000628:therapy; D016216:Ultrasonography, Prenatal; D018487:Ventricular Dysfunction, Left / Q000175:diagnosis / Q000196:embryology