16 February 2025
: Case report 
Right Bundle Branch Block on ECG as a Predictor of Sudden Cardiac Arrest Due to Pulmonary Embolism
Unusual clinical course, Challenging differential diagnosis, Management of emergency care
Chunliang Wang
ACE 1*, Yuzhu Fan BDE 2, Guiting Liang BC 2, Yu Chen BC 3, Ping Wang BE 4
DOI: 10.12659/AJCR.946074
Am J Case Rep 2025; 26:e946074
Figure 2. (A) The 4-chamber view reveals right ventricular dilation and hypokinesis, as well as interventricular septal flattening (white arrow). (B) The coexistence of an acceleration time of pulmonary ejection <60 ms (blue arrow) and a midsystolic notch (green arrow) indicates pulmonary arterial hypertension. (C) The velocity of tricuspid regurgitation was 2.6 meters per second. (D) The inferior vena cava diameter measured 2.15 cm, with a collapse index of less than 50%, suggesting an estimated right atrial pressure of 15 mmHg. Consequently, the pulmonary artery systolic pressure is estimated to be 42 mmHg.