PMC9974006_01
The 12-lead EKG shows sinus tachycardia at 107 beats per minute, first-degree heart block, right bundle branch block, and S1-Q3-T3 pattern.. EKG: Electrocardiogram
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FIG1
Initial EKG showed sinus tachycardia at 107 beats per minute, first-degree heart block, RBBB, and S1-Q3-T3 pattern (Figure 1).
The 12-lead EKG shows sinus rhythm at 70 bpm, intermittent second-degree Mobitz type II AV block, and right bundle branch block. EKG: Electrocardiogram
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FIG2
The CT pulmonary angiography shows bilateral filling defects within the pulmonary arterial tree, indicating extensive bilateral pulmonary emboli
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FIG3
Once hemodynamically stable, CT pulmonary angiography revealed acute pulmonary emboli bilaterally within the pulmonary arterial tree, including a large saddle embolus within the right and left main pulmonary arteries (Figure 3). 
The 12-lead EKG shows normal sinus rhythm at a rate of 75 bpm and left ventricular hypertrophy with secondary T wave inversions in the lateral leads. Note the resolution of the right bundle branch block, first-degree AV block, and second-degree AV block.. AV: Atrioventricular
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FIG4
AV block, and second-degree Mobitz type II block (Figure 4).