If you massage towards the heart it promotes venous blood return back to the hart so that it may get re-oxygenated. Arteries are lined by smooth muscle and they have valves where as the veins are a more passive system, so sometimes they need help.
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When the thoracic cavity is opened and the heart is compressed manually with your hands. Also known as internal massage.
Arteries carry blood away from the heart, veins carry blood to the heart
Veins usually transport blood towards the heart.
The physician must be sure there is no evidence of blockage in the carotid artery before performing the procedure. Massage in a blocked area might cause a clot to break loose and cause a stroke.
The heart rate would slow down because of the stilumation of the parasympathetic system. And you spelled "massage" wrong.