Congestion of the lungs and fluid accumulation are common. Fluid can also build up in the abdomen and around the lungs, if the right side of the heart is also involved. Congestion and fluid buildup indicate heart failure. Dogs with DCM-induced heart failure often have left-sided congestive failure.
Arterial anastomoses provides alternate pathways (collateral channels or collateral circulation) for blood to reach a given body region. If one arterial branch is blocked or cut, the collateral channel can often provide the region with an adequate blood supply and thereby, minimizing the damage at tissue level.rterial anastomoses are abundant in abdominal organs and around joints where active body movements may hinder blood flow through one channel. Arteries that do not anastomose, or have a poorly developed collateral circulation are known as end arteries. These end arteries supply the retina, kidneys, and spleen.
This is often a result of anastamoses, branches formed between adjacent blood vessels. Collateral circulation can be established in the venous system (between veins) or in the arterial system (between arteries). It may arise from pathological conditions such as congestion or ischaemia.An example of the usefulness of collateral circulation is a systemic thrombo-embolism in cats.This is when a thrombus lodges above the external iliac artery (common iliac artery), blocking the external and internal iliac arteries and effectively shutting off all blood supply to the hind leg.nother example (in humans) is where a person suffers an acute myocardial infarction (heart attack). Collateral circulation in the heart tissue will sometimes bypass the blockage in the main artery and supply enough oxygenated blood to enable the cardiac tissue to survive and recover.