<prompt> Answer this question truthfullyWhat is the scenario for abrupt closure and no-reflow in case 1?  <response>: <reason> Shown below is a pre-intervention angiogram with multiple significant lesions in the proximal and mid RCA.Shown below is an angiogram with occlusion at the mid RCA depicting abrupt closure.Shown below is a pre-intervention angiogram with significant lesion in the SVG saphenous vein graft to RCA.Shown below is an angiogram with ongoing intervention on the significant lesion described above.Shown below is a post-intervention angiogram with acute reduction in blood flow TIMI flow grade 1 in the absence of dissection, thrombus, spasm, or high-grade residual stenosis in the SVG saphenous vein graft depicting no-reflow.Shown below is a post-intervention angiogram with a complete restoration of blood flow TIMI flow grade 3 after transient no-reflow as depicted above. 