Thiamine Overdose. Overdosing on thiamine, or vitamin B-1, is rare but can cause severe symptoms. Mild symptoms of an overdose include weakness and a headache, the American Pregnancy Association reports. In some cases, high vitamin B-1 levels can cause a rapid, irregular heart beat and low blood pressure.
Ascending Aorta - initial part of the aorta that begins from the aortic valve and extends from the left ventricle of the heart to the aortic arch. Coronary Arteries - arteries branching from the ascending aorta to supply oxygenated blood to the heart wall.
Noun. 1. aorta-the large trunk artery that carries blood from the left ventricle of the heart to branch arteries. arteria, arterial blood vessel, artery-a blood vessel that carries blood from the heart to the body.ascending aorta-the ascending part of the aorta as it emerges from the left ventricle.aortic arch-the part of the aorta that arches and turns downward. descending aorta-the descending part of the aorta that branches into the thoracic and abdominal aortae. abdominal aorta-a branch of the descending aorta.scending aorta-the ascending part of the aorta as it emerges from the left ventricle. aortic arch-the part of the aorta that arches and turns downward. descending aorta-the descending part of the aorta that branches into the thoracic and abdominal aortae. abdominal aorta-a branch of the descending aorta.