Comparison of 6F and 7F Sheaths for Coronary Intervention Via Distal Radial Artery Access

Inclusion Criteria: * Age ≥18 years and ≤80 years; * Height ≤180 cm; * Distal radial artery diameter ≥1.7 mm; * Completed distal radial artery angiography and requires coronary intervention; * Tolerates dual antiplatelet therapy and intraoperative anticoagulant therapy, with no history of related drug allergies; * Patient consents to participate in the study. Exclusion Criteria: * Acute myocardial infarction requiring emergency PCI; * Ultrasound-confirmed occlusion of the radial artery on the procedure side; * Radial artery and distal radial artery anomalies (e.g., small caliber, tortuous, looped vessels) that make the dTRA approach unsuitable; * Previous bilateral radial artery intervention or surgery; * No coronary intervention performed after coronary angiography; * Inability to undergo coronary angiography and intervention due to subjective or objective reasons; * Coronary lesions requiring the use of a 7F guiding catheter; * Coronary arteries not suitable for 7F guiding catheter; * Severe liver or renal insufficiency, unresolved bleeding disorders, or other serious conditions with an expected survival of less than 1 year; * Currently breastfeeding or known pregnancy.