Spontaneous coronary artery dissection can be classified based on angiographic appearance into type 1 (evident arterial wall stain with multiple radiolucent lumens), type 2 (diffuse smooth stenosis of varying severity), and type 3 lesions (focal or tubular stenosis mimicking atherosclerosis). Type 4 SCAD lesion is characterized by dissection leading to an abrupt total occlusion, usually of a distal coronary segment.  The total occlusion occurs as a result of diminished true lumen due to external compression by intraluminal hematoma rather than embolism. The intermediate type 1/2 SCAD lesion is characterized by the appearance of type 1 in conjunction with type 2 lesion.
Spontaneous coronary artery dissection classification
Spontaneous coronary artery dissection diagnostic approach
Unstable angina / non ST elevation myocardial infarction classification
Left ventricular aneurysm classification
Spontaneous coronary artery dissection treatment approach
Spontaneous coronary artery dissection angiography
Aortic dissection classification
Spontaneous coronary artery dissection laboratory findings