Complications and Mortality of Single Versus Dual Chamber Implantable Cardioverter Defibrillators
Author Information
Author(s): Bagherzadeh Ataallah MD, Emkanjoo Zahra MD, Haghjoo Majid MD, Farahani Maryam Moshkani MD, Alizadeh Abolfath MD, Sadr-Ameli Mohammad Ali MD
Primary Institution: Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences
Hypothesis
The study aims to compare the frequency of complications and mortality between single-chamber and dual-chamber ICD implantation.
Conclusion
Close monitoring of patients during the first 2 months after ICD implantation is recommended because the majority of complications occur early after the procedure.
Supporting Evidence
- 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 and dual chamber ICD groups.
- The frequency of lead-related complications was higher in dual chamber ICDs compared to single chamber ICDs.
- Predictors of mortality included NYHA class III or more, age over 65 years, and LVEF less than 30%.
Takeaway
This study looked at how often problems happen after putting in heart devices called ICDs, and found that most issues happen soon after the device is placed.
Methodology
The study followed 234 patients who received ICDs over a period of 33 ± 23 months, comparing complications and mortality rates between single and dual chamber devices.
Potential Biases
The effects of differences in experience or surgical technique on complication rates were not controlled.
Limitations
The study had limitations due to variability in operator experience and some patients not following up regularly.
Participant Demographics
Patients included in the study were from a cardiovascular center in Iran, with a follow-up period of 33 ± 23 months.
Statistical Information
P-Value
P=0.11
Statistical Significance
p<0.05
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