PMC9340682_01
A. ECG at admission showed first degree AV block with narrow QRS duration, B. At second day hospitalization showed a 2:1 alternating with Mobitz 1 AV Block, C. On the 9th day of hospitalization, complete AV block with idioventricular escape rhythm occurred suggesting infra-His block, D. His bundle pacemaker implantation resulted in narrow QRS duration and pseudo-delta wave preceded with pacing spike resembling non-selective His bundle pacing
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Fig1
ECG showed first degree AV block with a rate of 86 bpm and PR interval of 240 ms (Fig. 1A). The rhythm was changed to a 2:1 AV block with a rate of 63 bpm (Fig. 1B). AV block with a ventricle escape rhythm of 36 bpm (Fig. 1C). At that time, the level of IL-6 was high 2417 pg/mL and increased to 2457 pg/mL three days later. The ECG after implantation showed A sense and His Bundle pacing (Fig. 1D).
Inflammatory markers trend during hospitalization
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PMC9340682_01_42444_2022_72_Fig2_HTML.jpg
Fig2
A 2-week-period observation did not result in improvement of the AV block despite the IL-6 level dropped (Fig. 2).