PM Dependency Index Calculator
- PM Dependency Index: Explanation and Clinical Context
The Pacemaker (PM) Dependency Index (PDI) is a quantitative tool used to estimate the degree of a patient’s reliance on ventricular pacing. It integrates intrinsic heart rate, ventricular pacing percentage, and atrioventricular block severity to provide a composite score.
A higher PDI indicates greater pacemaker dependency, which can guide clinicians in device programming, follow-up strategies, and risk stratification for complications associated with long-term pacing.
Clinically, PDI helps identify patients who may experience symptomatic bradycardia if the pacemaker fails and supports decision-making regarding device upgrades or monitoring intensity.
Reference:
Brunner-La Rocca HP, et al. “Determinants of pacemaker dependency in patients with permanent pacemakers.” Heart. 2006;92:1043-1048. doi:10.1136/hrt.2005.068654
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