case_images: PMC7069049_01
case_images: ECG tracings of the patients (25 mm/s,10 mm/mV). a Atrial fibrillation (sinus:131 bpm) (d + 9) b Premature onset,sinus arrest or sinus block (d + 18). Sudden chest tightness, shortness of breath, followed by ass attack was occurred. c Borderline escape rhythm with sinus capture (d + 22). A temporary heart pacemaker had been placed for 3 days. d Spontaneous rhythm and pacemaker heart rate alternately appear (d + 28)
case_images: 40959_2020_59_Fig1_HTML.jpg
case_images: PMC7069049_01_40959_2020_59_Fig1_HTML.jpg
case_images: Fig1
case_images: On d + 9, she felt palpitation again, ECG revealing paroxysmal AF and atrial flutter, then she was treated with metoprolol tartrate again, however, it didn't improve her symptoms (Fig. 1a). However, she developed chest tightness, shortness of breath, followed by ass attack on d + 18(Fig. 1b). Long intervals of RR with more than 2 s (13 times), and the longest RR was 4.1 s. 3) junctional escape rhythm and escape beat were observed sometimes. 4) ventricular pacing, ventricular intermittent pacing dysfunction. 5) frequent atrial premature (3917 times), partial two-triplet rhythm. 6) occasional ventricular premature (57 times) (Fig. 1c). On d + 28 because of sinus arrest and the long interval of RR, she was embedded in two-chamber permanent heart pacemaker (Fig. 1d).