[X-ray densitometric measurement of myocardial perfusion reserve in symptomatic patients without angiographically detectable coronary stenoses].

Background: Patients with typical angina pectoris but without coronary artery disease (CAD) are distinct in clinical aspects. In only few patients no abnormality is detected. Most present at least one or more cardiovascular risk factors and/or signs of myocardial ischemia.

Transient occlusion of an Angioguard protection system by massive embolization during angioplasty of a degenerated aortocoronary saphenous vein graft.

Distal embolization is the most important complication of balloon dilatation of degenerated saphenous vein grafts. We describe a case of massive embolization associated with transient occlusion in which larger distal embolization and myocardial infarction were avoided despite transient but complete occlusion of a filter protection system (Angioguard).