Comparison of DCB and DES for Severe Calcification of de Novo Lesion in Elderly CHD

Brief Summary

The goal of this clinical trial was to compare the effectiveness of drug balloons versus drug-coated stents in calcified lesions in elderly coronary artery disease. The main question it aims to answer is whether the application of DCB is non-inferior to DES for in situ large vessel calcified lesions in the elderly coronary arteries. And to develop a method to precisely identify the nature and extent of calcified lesions and to rationalize the choice of pretreatment.