Yes, sometimes this is the case. In fact, collateral systems among the coronary arteries have been hypothesized to "save" individuals from heart attacks and even death, when the main coronary arteries are completely or almost completely blocked.
Yes, anastomoses among coronary arterial branches can provide collateral routes for blood delivery to the heart muscle. If one branch becomes blocked, blood can flow through these connections to ensure the heart muscle still receives adequate blood supply.
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Diastole
You can find more information on Coronary bypass graft 2 venous and 1 arterial on ahrq.gov/research/findings/final-reports/ssi/ssiapd.html
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Left coronary artery.
Aids
Left coronary artery
cause visually they look like branches
The left and right coronary arteries.
Angioplasty or balloon angioplasty is the medical term meaning passage of a balloon catheter through the lumen of an occluded coronary vessel to compress plaque against the arterial walls.