The left border of heart (or obtuse margin) is formed from the rounded lateral wall of the left ventricle. It is called the 'obtuse' margin because of the obtuse angle (>90 degrees) created between the anterior part of the heart and the left side, which is formed from the rounded lateral wall of the left ventricle. Within this margin can be found the obtuse marginal artery, which is the a branch of the left circumflex artery.
It extends from a point in the second left intercostal space, about 2.5 mm. from the sternal margin, obliquely downward, with a convexity to the left, to the apex of the heart.
This is contrasted with the acute margin of the heart, which is at the border of the anterior and posterior surface, and in which the acute marginal branch of the right coronary artery is found. The angle formed here is <90 degrees, therefore an acute angle.
and 23 Related for: Left border of heart information
The leftborderofheart (or obtuse margin) is formed from the rounded lateral wall of the left ventricle. It is called the 'obtuse' margin because of the...
the heart is between the lungs, the left lung is smaller than the right lung and has a cardiac notch in its border to accommodate the heart. The heart is...
diastolic decrescendo murmur. One can hear it at the left lower sternal border. One may see signs of right heart failure on exam. Pulmonary valve regurgitation...
Emily's racing heartbeat Heart sounds of a 16 year old girl immediately after running, with a heart rate of 186 BPM. The S1 heart sound is intensified due...
mammalian heart are two atrioventricular valves separating the upper atria from the lower ventricles – the mitral valve in the leftheart, and the tricuspid...
The right borderof the heart (right margin ofheart) is a long border on the surface of the heart, and is formed by the right atrium. The atrial portion...
or left atrioventricular valve, is one of the four heart valves. It has two cusps or flaps and lies between the left atrium and the left ventricle of the...
and other components of the heart. Two coronary arteries originate from the left side of the heart at the beginning (root) left ventricle. There are three...
in which the heart becomes enlarged. It is more commonly referred to simply as "having an enlarged heart". It is usually the result of underlying conditions...
has an indentation in its border called the cardiac notch of the left lung to accommodate this. The front and outer sides of the lungs face the ribs, which...
electrocardiography, left axis deviation (LAD) is a condition wherein the mean electrical axis of ventricular contraction of the heart lies in a frontal...
conduction system of the heart) transmits the signals generated by the sinoatrial node – the heart's pacemaker, to cause the heart muscle to contract...
intercostal space on the left sternal border where S2 heart sound is best auscultated. Some sources include the fourth left interspace. Human female breasts...
heart disease is any cardiovascular disease process involving one or more of the four valves of the heart (the aortic and mitral valves on the left side...
Diastolic heart murmurs are heart murmurs heard during diastole, i.e. they start at or after S2 and end before or at S1. Many involve stenosis of the atrioventricular...
Systolic heart murmurs are heart murmurs heard during systole, i.e. they begin and end between S1 and S2. Many involve stenosis of the semilunar valves...
tissue or organ of the body. The coronary arteries wrap around the entire heart and both lungs . The two main branches are the left coronary artery and...
the heartof humans and most other animals, located between the left ventricle and the aorta. It is one of the four valves of the heart and one of the...
are offshoots of the bundle of His in the heart's ventricle. They play an integral role in the electrical conduction system of the heart by transmitting...
the heart displaced to the left with part of the lungs squeezed between inferior borderofheart and diaphragm. Fibrous pericardium Cytology of the normal...
tendinea) or tendinous cords, colloquially known as the heart strings, are inelastic cords of fibrous connective tissue that connect the papillary muscles...
wall dividing the left and right ventricles of the heart. The extent of the opening may vary from pin size to complete absence of the ventricular septum...
Global Information
