Lab 5-3 Heart

Pericardiacophrenic Vessels Off what vessels do they branch from? Veins: Drain into R/L Brachiocephalic vv Arteries: Branch from R/L Internal thoracic aa

Fibrous Pericardium

Parietal Layer

Visceral Layer

Clinical Correlates Accumulation of fluid within the pericardial sac is… Pericardial effusion The excess fluid compresses the heart and causes biventricular failure aka… Cardiac tamponade

Transverse pericardial sinus

Oblique Pericardial Sinus

Apex

Base What makes up the base? – L atrium – Sm. Portion of R atrium – Proximal parts of the great viens

Right Atrium

Right Ventricle

Left Atrium

Left Ventricle

Orientation of Heart Which chamber has the largest diaphragmatic contact? Right Ventricle

Crista Terminalis

Sinus Venarum What empties blood into this space? Superior and Inferior Venae cavae

Pectinate Muscles

Fossa Ovalis What was this depression during embryonic development? Foramen ovale It’s function? Oxygenated blood from R atrium to L atrium so it can bypass the lungs

Opening of the Coronary Sinus Any guesses what veins will empty into here? Great, Middle, and Small Cardiac Veins

Tricuspid Valve

Pulmonary Valve

Mitral Valve

Chordae Tendineae

Trabeculae Carnae What are the trabeculae Carnae that have one end attached to the ventricular surface and the other end attached to the chordae tendinae called? Papillary Muscles

How many in right ventricle vs left? Right Ventricle: Anterior, Posterior, and Septal (sometimes small or even absent) Left Ventricle: Only Anterior and Posterior

Conus Arteriosis

Membrane Interventricular Septum

Muscular Interventricular Septum

Septomarginal Trabeculum What is it and what’s its function? A band of myocardium that connects the interventricular septum and the anterior papillary muscle Carries a portion of the cardiac conduction system-the right bundle branch-to the anterior wall of the right ventricle

Conduction System: Right Bundle Branch

Conduction System: Left Bundle Branch

Right Coronary a.

Right Marginal a. What does it supply? Right Ventricle

Right Atrial aa. Which one is the SA nodal artery? The artery which passes posteriorly between the aorta and superior vena cava

Right Posterior ventricular a

AV Nodal a

Left Coronary

Anterior interventricular a

Anterior Interventricular a (posterior view) What does it supply? R and L ventricles and interventricular septum Clinical name? Left anterior descending artery (LAD)

Left Marginal a

Circumflex branch of Left Coronary a Supply? Left atrium and Left ventricle Name the 2 descending branches.. (More Superior) = Lt. posterior ventricular a (Inferior branch) = Posterior interventricular a

Posterior interventricular a Which coronary artery does this most commonly originate from (right or left)? Right However, AP decided to use a Left coronary a. dominant pattern =supplying most of the posterior wall

Coronary Sinus

Small Cardiac v

Middle Cardiac v

Great Cardiac v

Anterior Cardiac vv (Right and Left)

CT Imaging Right ventricle Ascending aorta Pulmonary vv Descending aorta

CT imaging Right Coronary Artery Right Atrium Left Coronary Artery