Abstract: The invention is directed to tri-phasic pulse generation techniques that make use of a pre-stimulus phase, a stimulus phase, and a post-stimulus phase in a pulse generation cycle. During the pre-stimulus phase, an output capacitor is charged to a desired voltage level. During the stimulus phase, the capacitor is discharged, and during the post-stimulus phase recharging of the capacitor begins again. In accordance with the invention, charging of the output capacitor can be terminated during the post-stimulus phase after a measured voltage in the patient is greater than or equal to a threshold.

Abstract: The invention is directed to tri-phasic pulse generation techniques that make use of a pre-stimulus phase, a stimulus phase, and a post-stimulus phase in a pulse generation cycle. During the pre-stimulus phase, an output capacitor is charged to a desired voltage level. During the stimulus phase, the capacitor is discharged, and during the post-stimulus phase recharging of the capacitor begins again. In accordance with the invention, charging of the output capacitor can be terminated during the post-stimulus phase after a measured voltage in the patient is greater than or equal to a threshold.

Abstract: A method and system for atrial capture detection based on far-field R-wave (FFRW) sensing is provided. After establishing that stable FFRW sensing exists, presence of atrial capture can be detected by atrial sensing of the FFRW in a predetermined FFRW detection window following an atrial pace. Threshold values for the atrial pace can be determined by varying an atrial test variable and observing whether a FFRW occurs in the FFRW detection window. In another embodiment, threshold values for the atrial pace can be determined by applying a search pace before the regular atrial pace, varying an atrial test variable for the search pace, and monitoring the movement of the FFRW between the FFRW detection window and a predetermined search detection window located before the FFRW detection window.

Abstract: A method and system for atrial capture detection based on far-field R-wave (FFRW) sensing is provided. After establishing that stable FFRW sensing exists, presence of atrial capture can be detected by atrial sensing of the FFRW in a predetermined FFRW detection window following an atrial pace. Threshold values for the atrial pace can be determined by varying an atrial test variable and observing whether a FFRW occurs in the FFRW detection window. In another embodiment, threshold values for the atrial pace can be determined by applying a search pace before the regular atrial pace, varying an atrial test variable for the search pace, and monitoring the movement of the FFRW between the FFRW detection window and a predetermined search detection window located before the FFRW detection window.