Table 4.

Main auxiliary examination characteristics related to PE.

Pt	Echocardiography	Typical electrocardiogram of PE	CTPA
1	Both ventricles with normal size and function, normal pulmonary arterial pressure	None	Little perfusion absence in the dorsal segment pulmonary artery in the right lower lobe
2	RV filled, pulmonary artery slightly widened, LA/LV slight dilation	None	PE in the apical segment of the right upper lobe、the dorsal segment of the right the lower lobe, and the posterior basal segment of the left lower lobe
3	RA/RV dilation, Inferior vena cava enlarged, pulmonary arterial hypertension	None	N/A
4	N/A	None	Bilateral pulmonary embolism
5	Acute enlargement of RV, pulmonary arterial hypertension	None	Multiple PE in both lungs
6	N/A	N/A	PE in the lingual segment of the left upper lobe and the lateral basal segment of the left lower lobe
7	N/A	N/A	PE in the right pulmonary artery trunk, the right upper pulmonary artery, the right middle pulmonary artery, the right lower pulmonary, and its basal branches.
8	Pulmonary arterial hypertension, enlargement of RV outflow tract, LA dilation	Yes	Filling defect in the right upper pulmonary artery

PE, pulmonary embolism; RA, right atrium; RV, right ventricle; LA, left atrium; LV, left ventricle; CTPA, computed tomographic pulmonary arteriography.