Which Patients Are Not Suitable for a Subcutaneous ICD: Incidence and Predictors of Failed QRS‐T‐Wave Morphology Screening

• DOI: 10.1111/jce.12343
• Publication Date: 2013-12-09T20:26:43Z
• Authors: LOUISE R.A. OLDE ...; JOPPE L.F. WARNAARS; KIRSTEN M. KOOIMAN; JORIS R. de GROOT; BOUDEWIJN R.A.M. ...; ARTHUR A.M. WILDE; REINOUD E. KNOPS
• Keywords: Supine position; Lead (geology)

The subcutaneous cardioverter-defibrillator (S-ICD) relies on a pre-implantation QRS-T morphology screening (TMS) of the ECG to assure that it reliably detects QRS complexes and T waves. prevalence clinical characteristics patients who fail this TMS is unknown.QRS-TMS was done in 230 consecutive ICD outpatients (75% male, age 57 ± 15 years) without an indication for cardiac pacing, using simulating 3 sensing vectors S-ICD (TMS-ECG). Patients were defined suitable when at least 1 vector considered appropriate both supine standing position. In total, 7.4% patients, all not according TMS-ECG. Independent predictors failure hypertrophic cardiomyopathy (HCM; odds ratio [OR] 12.6), heavy weight (OR 1.5), prolonged duration 1.5) R:T <3 lead with largest wave standard 12-lead surface 14.6).In would have been TMS. HCM, weight, independently associated failure. These data might alert physicians selection should be special caution certain patient groups, because they may satisfy criteria adequate sensing.