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pacemaker aortic valvuloplasty interventions fetal localization fitzpatrics aligorithm arruda criteria accessory pathway wpw syndrome transcatheter mitral valve replacement coronary sinus devices mitra clip tcmvr staruss method sact snrt ep study sinus node sa node congenital pda heart manipulation duct cyanotic diasease ductus echo coronaries cardiac resynchronization therapy crt laa closure balloon mitral valvotomy inter atrial septal puncture transseptal puncture coronary artery disease management of cad in women heart attack in women cad anti arrhythmic agents ibitilide components of pacing function of pm pulse generator leads hardware icd vf vt tachycardia alogrithms in icd icd working pattens recurrent shocks triubleshoot icds fetal procedures ias stenting cardiac pacing pulmonary valvuloplasty balloon valvuloplasty echocardiography and ultrasound probes