Spider view – LAO caudal view of left coronary angiogram

Spider view – LAO caudal view of left coronary angiogram

Left anterior oblique (LAO) caudal view of left coronary angiogram resembles a spider and hence the term spider view. It is useful in delineating the left main coronary artery and the proximal region of major branches. It is often the first view taken during coronary angiography, especially when left main disease is suspected.
LMCA: left main coronary artery; LCX: left circumflex coronary artery (lesion in LCX marked by yellow arrow); LAD: left anterior descending coronary artery; Early OM: early obtuse marginal branch of the LCX. Dye (contrast) reflux into the aorta from LMCA is seen. Absence of dye reflux would mean left main ostial disease or rarely spasm.