Variation and clinical significance of interventricular septal branches of coronary artery on angiography

AIM:To summarize imaging features of interventricular septal branches of coronary artery and to explore their clinical significance. METHODS: We classified and compared the imaging features of interventricular septal branches (including numbers, dimensions and distribution) from 200 cases of normal coronary angiography with some risk factors of coronary heart diseases, 76 cases of hypertrophic obstructive cardiomyopathy (HOCM) and 28 cases of coronary heart diseases with right coronary chronic total occlusion (CTO). RESULTS: No significant differences were observed in the imaging features of interventricular septal branches between normal cases and cases of HOCM or right CTO, and Type I was the most common (P<0.05, P<0.01). CONCLUSION: The dimensions and distribution in interventricular septal branches of coronary artery are similar in cardiovascular diseases and interventricular septal branches of coronary artery can serve as ideal target vessels for both retrograde approach of right CTO recanalization and percutaneous transluminal septal myocardium ablation in HOCM.