【Abstract】 Objective: To evaluate the feasibility and efficiency with small C arm X ray machine performing percutaneous transluminal coronary angioplasty (PTCA) Methods: Clinical data of 34 cases of coronary artery diseases performing PTCA with small C arm X ray machine between February 1998 and October 1998 were analysed retrospectively There were 32 males 2 females with a mean age of 56 3±9 9 years old Twenty on of them were acute myocardial infarction, 11 unstable angina, 2 stable angina with clinical evidence of myocardial ischemia Six cases were multivessel disease, 28 cases single vessel disease with 13 tandem lesions, 9 cases bifurcation lesions Left anterior descending artery and its branches were 24, left circumflex and its branches 7, and right coronary artery 9 Forty were stenotic lesions, 10 occlusive lesions with 2 chronic occlusive lesions One were type A lesions, 17 (34%) type B lesions, and 32 (64%) tyep C lesions Results: Procedureal success rate was 88 2% (31/34), vessel success rate 87 5% (35/40), lesion success rate 90% (45/50) Stenosis was decreased from preprocedureal (93 3±4 6)% ( ±s ) to postprocedural (3 9±6 7)% Success rate was 100% (18/18) for type A and B lesions, 84 4% (27/32) for type C lesion Stent was used in 82 4% (27/32) cases due to suboptimal balloon angioplasty and intimal dissections Two cases died of cardiogenic shock and ventricular tachycardia after procedures All patients were well during the follow up except 2 with multivessel disease who had recurrent angina Analysis showed that lesion type closely related with success rate, complication, and restenosis Conclusion: The application of small C arm X ray machine could meet the need for interventional cardiology in county hospital更多还原