Objective To investigate the value of CT pulmonary angiography （CTPA）

electrocardiogram and echocardiography in the diagnosis of acute pulmonary embolism （APE）.Methods A total of 120 patients suspected of APE were selected from our hospital from January 2019 to December 2020.CTPA

Electrocardiogram and echocardiography were performed on all patients

and the application value of the above methods in the diagnosis of APE was evaluated accor

ding to the imaging characteristics.Results CTPA results showed that 86 of the 120 patients were confirmed as APE-ape （APE group） and 34 were non-APE （non-APE group）.There were uneven low-density shadows in the vascular lumen of APE patients

and 636 emboli were detected.The proportion of incomplete right beam branch block （IRBBB）

T wave inversion in lead V

1

T wave inversion in lead V

2

S

I

Q

Ⅲ

T

Ⅲ

sign

ST segment elevation in lead V

1

and lead V

2

<

0.1mV

turn clockwise and atrial fibrillation in APE group were significantly higher than those in non-APE group （p

<

0.05）.The proportion of echocardiographic signs such as tricuspid regurgitation

pulmonary hypertension

right ventricular enlargement and pulmonary artery thrombosis in APE group was higher than that in non-APE group （p

<

0.05）.The sensitivity and specificity of electrocardiogram in diagnosing APE were 84.88%

29.41% respectively

the sensitivity and specificity of echocardiogram in diagnosing APE were 95.35%

85.92%respectively

and the sensitivity and specificity of both in diagnosing APE were 98.84%

91.18% respectively.Conclusions The increase of FPG and NE counts in early pregnancy is related to the occurrence of GDM.FPG and NE counts can be used as important index to predict the occurrence of GDM.