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
Papillary Muscles
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