@misc{cogprints4800,
          volume = {6},
          number = {2},
           month = {April},
          author = {Ataallah Bagherzadeh and Zahra Emkanjoo and Majid Haghjoo and Maryam Moshkani Farahani and Abolfath Alizadeh and Mohammad Ali Sadr-Ameli},
          editor = {Balbir Singh and Yash Lokhandwala and Johnson Francis and Anup Gupta and Joydeep Ghosh},
           title = {Complications and Mortality of Single Versus Dual Chamber Implantable Cardioverter Defibrillators },
       publisher = {Indian Pacing and Electrophysiology Group},
            year = {2006},
         journal = {Indian Pacing and Electrophysiology Journal},
           pages = {75--83},
        keywords = {implantable cardioverter-defibrillator; complication; mortality },
             url = {http://cogprints.org/4800/},
        abstract = {Background: The implantable cardioverter defibrillators (ICDs) are increasingly being used as a treatment modality for life threatening tachyarrhythmia. The purpose of this study was to compare the frequency of complications and mortality between single-chamber and dual-chamber ICD implantation in Shahid Rajaie cardiovascular center.

Methods and results: Between January 2000 and December 2004, 234 patients received ICD by a percutaneous transvenous approach and were followed for 33 {$\pm$} 23 months. The cumulative incidence of complications was 9.4\% over the follow-up period. There was no significant difference in overall complication rate between single chamber (VR) and dual chamber (DR) ICD groups in the follow-up period (P= 0.11). The risk of complications did not have any statistically significant difference in secondary versus primary prevention groups (P=0.06). The complications were not associated with the severity of left ventricular systolic dysfunction (P=0.16).The frequency of lead-related complications was higher in dual chamber ICDs in comparison with single chamber ICDs (P=0.02). There was no significant difference in mortality between different sex groups (P=0.37), different indications for ICD implantation (P=0.43) or between VR and DR ICD groups (P= 0.55). Predictors of mortality were NYHA class III or more (P{\ensuremath{<}}0.001), age {\ensuremath{>}}65 years (P=0.011) and LVEF{\ensuremath{<}}30\% (P{\ensuremath{<}}0.001). The mortality in patients with CAD and DCM were significantly higher than those with other structural heart diseases (P=0.001).

Conclusions: Close monitoring of patients during the first 2 month after ICD implantation is recommended because the majority of complications occur early after the procedure.
}
}

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