Correct midseptum placement of the right ventricular lead was associated with significantly fewer leads in the outer quadrant on right anterior oblique 30 view compared to anterior wall placement (9.6% vs 96.7%, P<0.001).
Observational (n=51)
Does the use of right anterior oblique (RAO) 30 projection improve the correct localization of right ventricular leads into the midseptum compared to left anterior oblique (LAO) projection alone in patients undergoing pacemaker implantation?
The use of right anterior oblique 30 projection, specifically targeting the middle or inferior quadrants, significantly improves the accuracy of right ventricular midseptal lead placement compared to standard left anterior oblique views alone.
Absolute Event Rate: 9.6% vs 96.7%
p-value: p=<0.001
BACKGROUND: The aim of the study was to verify the correct anchoring location for the tip of the right ventricular lead using cardiac computed tomography and to assess the best fluoroscopic and ECG criteria associated with the correct location of the electrode into the midseptum. METHODS AND RESULTS: Patients indicated to pacemaker implantation were prospectively enrolled. The right ventricular lead was implanted into the midseptum according to standard criteria in left anterior oblique 40 view. The cardiac shadow on the right anterior oblique 30 was divided into 4 quadrants perpendicular to the lateral cardiac silhouette and the position of the lead tip was analyzed. The exact position of the lead tip was assessed using computed tomography. Of 51 patients, the right ventricular lead was anchored midseptum in 21 (41.2%; MS group). In 30 patients (58.8%; non-MS group), the lead was anchored in the adjacent anterior wall. The angle between the lead and horizontal axis on the left anterior oblique was similar in both groups. The non-MS group was associated with shorter distances between the tip and the cardiac contours in the right anterior oblique 30 (96.7% of leads in the non-MS group were in the outer quadrant versus 9.6% in the MS group; P<0.001). The presence of the lead in the middle or inferior quadrants was independently associated with correct midseptum placement with positive predictive value of 94.7%. CONCLUSIONS: Despite the optimal shape of the left anterior oblique, substantial numbers of leads were not anchored in the midseptum. Knowing the right anterior oblique 30 lead position can ensure proper midseptal placement.
Osmančík et al. (Fri,) conducted a observational in Pacemaker implantation (n=51). Correct midseptum placement (MS group) vs. Anterior wall placement (non-MS group) was evaluated on Presence of the lead in the outer quadrant on right anterior oblique 30 view (p=<0.001). Correct midseptum placement of the right ventricular lead was associated with significantly fewer leads in the outer quadrant on right anterior oblique 30 view compared to anterior wall placement (9.6% vs 96.7%, P<0.001).