AIM: Recent studies have shown that a quadripolar left ventricular (LV) lead can result in low rates of dislocation and phrenic nerve stimulation (PNS) acutely and on medium-term follow-up in cardiac resynchronization therapy (CRT). We evaluated the outcomes of CRT patients in whom a quadripolar LV lead was implanted in our institution. METHODS: We studied 45 consecutive heart failure patients (75 % men; age, 70.3 ± 9.0 years) following successful implantation of a quadripolar LV lead. Demographic and clinical data were collected preoperatively, and patients were followed up for 18.9 months. RESULTS: The implantation success rate was 100 %. Mean overall duration was 100.1 ± 34.6 min, and X-ray exposure time was 13.20 ± 13.5 min. The most distal effective pacing site was used as the final pacing configuration in all patients. Acute dislodgment requiring reoperation occurred before discharge in three cases (6.6 %). Six patients (13 %) suffered PNS during follow-up; we solved this problem by changing the stimulation vector. Three months after implantation, a mean of six out of ten effective sites (threshold <2.5 V at 1.5 ms, no PNS) per patient was recorded. CONCLUSIONS: Over the relatively long term, the quadripolar LV lead was associated with excellent pacing thresholds and low rates of dislocation and PNS.
AIM: Recent studies have shown that a quadripolar left ventricular (LV) lead can result in low rates of dislocation and phrenic nerve stimulation (PNS) acutely and on medium-term follow-up in cardiac resynchronization therapy (CRT). We evaluated the outcomes of CRT patients in whom a quadripolar LV lead was implanted in our institution. METHODS: We studied 45 consecutive heart failurepatients (75 % men; age, 70.3 ± 9.0 years) following successful implantation of a quadripolar LV lead. Demographic and clinical data were collected preoperatively, and patients were followed up for 18.9 months. RESULTS: The implantation success rate was 100 %. Mean overall duration was 100.1 ± 34.6 min, and X-ray exposure time was 13.20 ± 13.5 min. The most distal effective pacing site was used as the final pacing configuration in all patients. Acute dislodgment requiring reoperation occurred before discharge in three cases (6.6 %). Six patients (13 %) suffered PNS during follow-up; we solved this problem by changing the stimulation vector. Three months after implantation, a mean of six out of ten effective sites (threshold <2.5 V at 1.5 ms, no PNS) per patient was recorded. CONCLUSIONS: Over the relatively long term, the quadripolar LV lead was associated with excellent pacing thresholds and low rates of dislocation and PNS.
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Authors: John G F Cleland; Jean-Claude Daubert; Erland Erdmann; Nick Freemantle; Daniel Gras; Lukas Kappenberger; Luigi Tavazzi Journal: N Engl J Med Date: 2005-03-07 Impact factor: 91.245
Authors: Arthur J Moss; W Jackson Hall; David S Cannom; Helmut Klein; Mary W Brown; James P Daubert; N A Mark Estes; Elyse Foster; Henry Greenberg; Steven L Higgins; Marc A Pfeffer; Scott D Solomon; David Wilber; Wojciech Zareba Journal: N Engl J Med Date: 2009-09-01 Impact factor: 91.245
Authors: Giovanni B Forleo; Luigi Di Biase; Germana Panattoni; Massimo Mantica; Quintino Parisi; Annamaria Martino; Augusto Pappalardo; Domenico Sergi; Manfredi Tesauro; Lida P Papavasileiou; Luca Santini; Leonardo Calò; Claudio Tondo; Andrea Natale; Francesco Romeo Journal: J Interv Card Electrophysiol Date: 2014-12-13 Impact factor: 1.900