PO-01-014 IMPACT OF GENDER ON P- AND R-WAVE AMPLITUDE IN A SURFACE EKG SIMULATION STUDY FOR INSERTABLE CARDIAC MONITOR

Cosmetic concerns or anatomic differences between males and females may influence implantation location of Insertable Cardiac Monitor (ICM). To assess device, implant patient factors impacting electrogram sensing by proxy precordial single-lead surface EKG recordings. 150 participants each had 12 separate tracings acquired using Northeast Holter (DR200/HE) placed at the parasternal 4th intercostal space to mimic ICM 3M electrodes were positioned different vector length (75mm & 45mm) for three angles (vertical, oblique, horizontal) repeated in two postures (upright supine). Height weight assessed body area (BSA) calculation impedance-based fat percentage (BF%) was measured. All strips uploaded into DigitizeIt software offline analysis blinded technicians. Kruskal-Wallis test with Dunn’s multiple pairwise comparisons performed gender EGM amplitudes. A total 1,800 from [55.5% male, median age 59years (IQR 35 – 73)] assessed. Compared male participants, lower [73 (60 - 87) vs. 84kg (75 98), p<.001] but higher BF% [24.4 ± 8.8 35.2 9.6%, p<.001]. There no difference P-wave amplitude angle lengths (Panel A). Male larger R-wave vertical orientation both lengths, seen other B). Overall 45% (.042 .029mV, p<.001) 53% (.81 .53 mV, 75 vs 45mm. The oblique largest .038mV (.022 .054) 0.76mV (0.52 1.08). identical all angles. Marginal are noted only, not horizontal angle. Although P- amplitudes, a longer provides amplitudes which be important achieving adequate when is influenced cosmetic anatomical considerations.