Abstract
Background: Percutaneous coronary angiography is considered the "gold standard" for the diagnosis of coronary artery disease and provides the necessary anatomical information to provide appropriate treatment. The limitation of coronary angiography is the accurate assessment of calcified coronary lesions. Intravascular ultrasonography has many advantages in the assessment of calcified coronary lesions.
 Methods: The descriptive clinical study. Evaluation of calcified coronary artery lesions by intravascular ultrasound
 Results: From January 2019 to December 2019, at the Hanoi Heart Institute, 64 patients had 64 coronary artery lesions surveyed by intravascular ultrasound. There were 42 (65,6%) calcified lesions assessed by IVUS and 25 (39,1%) calcified lesions were detected by coronary angiography. In addition, the location of calcified were revealed more in the LAD compared to other: LAD 60%, LCx 24%, RCA 12% and LM 4%.
 Conclusion: IVUS calcification detection rate is higher than coronary angiography. The most common site of calcification in the LAD.
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