Click on image to view larger version.

Figure 3 Ventricular Rate Precipitating Inappropriate Shock

The heart rate at the time of the ICD detection resulting in a patient’s first inappropriate shock is shown in the bar graph in groups of 10 beats/min. Atrial fibrillation episodes are shown with cross-hatched bars, and SVT episodes are shown with solid bars. Inappropriate shocks caused by abnormal sensing are excluded because the device has by definition misconstrued the actual ventricular rate (typically normal in these cases). The events relate to shocks, not patients, in this figure. Abbreviations as in figure 2.