Venous Drainage

A. The great cardiac vein follows the anterior interventricular artery and drains into the coronary sinus.

B. The middle cardiac vein follows the posterior interventricular artery and drains into the coronary sinus.

C. The small cardiac vein follows the right marginal artery and drains into the coronary sinus.

D. The anterior cardiac veins are found on the anterior aspect of the right ventricle and drain directly into the right atrium.

E. The smallest cardiac veins begin within the wall of the heart and drain directly into the nearest heart chamber.

Figure 5-2. Blood supply of the heart. (>4) Sternocostal surface of the heart. (B) Diaphragmatic surface of the heart. (C) Right anterior oblique arteriogram of the right coronary artery. (D) Right anterior oblique arteriogram of the left coronary artery. A = atrial branches; AD = anterior diagonal artery; AIV = anterior interventricular artery; AM = anterior marginal artery; AV = atrioventricular nodal artery; C= circumflex artery; L = left coronary artery; OM= obtuse marginal artery; PIV= posterior interventricular artery; PM= posterior marginal artery; R= right coronary artery; RM = right marginal artery; S = septal branches; SA = sinoatrial nodal artery; TB = terminal branches. (C and D reprinted with permission from Fleckenstein P, Tranum-Jensen J: Anatomy in Diagnostic Imaging. Philadelphia, WB Saunders, 1993, pp 232, 233.)

VI. VALVES AND AUSCULTATION SITES (Figure 5-3)

A. The pulmonary valve is the outflow valve of the right ventricle. It is composed of three cusps (right, left, and posterior) that fit closely together when they are closed. It sometimes is referred to as a semilunar valve. It can be auscultated at the edge of the sternum at left intercostal space 2.

B. The aortic valve is the outflow valve of the left ventricle. It is composed of three cusps (right, left, and posterior) that fit closely together when they are closed. The aortic valve sometimes is referred to as a semilunar valve. It can be auscultated at the edge of the sternum at right intercostal space 2.

C. The mitral (left atrioventricular) valve is located between the left atrium and the left ventricle. It is composed of two cusps (anterior and posterior) both of which are tethered to papillary muscles by chorda tendineae. It can be auscultated at the cardiac apex at left intercostal space 5.

D. The tricuspid (right atrioventricular) valve is located between the right atrium and the right ventricle. It is composed of three cusps (anterior, posterior, and septal) all of which are tethered to papillary muscles by chorda tendineae. It can be auscultated over the sternum at intercostal space 5.

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Responses

  • lea
    Where does the cardiac septal venous drain into?
    6 years ago

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