Table 3.
Normal Age-Associated Changes in Resting EKG Measurements
| Measurement | Change with Age | Effect on Mortality |
|---|---|---|
| R-R Interval | No Change | |
| P-wave duration | Minor Increase | None |
| P-R Interval | Increase | None |
| QRS duration | No change | |
| QRS axis | Leftward shift | None |
| QRS voltage | Decrease | None |
| Q-T interval | Minor increase | Probable increase |
| T-wave voltage | Decrease | None |
Modified from Lakatta EG, Sollott SJ, Pepe S. The old heart: operating on the edge. Novartis Found. Symp. 2001;235:172–96; discussion 196–201, 217–20.