1 Flashcards
Blood vessels supplying the heart
1) RIGHT CORONARY ARTERY (RCA)
2) LEFT MAIN CORONARY ARTERY (LCA)
a) LEFT ANTERIOR DESCENDING ARTERY (LAD)
b) LEFT CIRCUMFLEX ARTERY (LCX)
POSTERIOR DESCENDING ARTERY (90% RCA, 10%LCX)
What does the LAD supply
Anterior wall of left ventricle
Anterior septum
Apex
Anteriolateral papillary muscles of mitral valve
What does LCX supply
Lateral wall of left ventricle
Anterolateral papillary muscle
Posteromedial papillary muscle
What does RCA supply
Right ventricle
Posteromedial papillary muscles of the mitral valve
What does the PDA supply
Inferior wall of left ventricle
Inferior septum
Where does Venus blood from the coronary artery drain into
Coronary sinus
What could cause a dilated or enlarged coronary sinus
Anything that increases the pressure in the right atrium
Cardiac Electrical System
SA node - both atrias - AV node (interatrial septum) - Bundle of HIS (interventricular septum) - Left bundle branch (LBB) & Right bundle branch (RBB) - purkinje fibers
Systolic blood pressure is determined by
Stroke volume
Diastolic blood pressure is determined by
Total peripheral Resistance (TPR)
How to calculate pulse pressure
Systolic (SBP) - Diastolic (DBP)
Branches of the aortic arch
Brachiocephalic artery
Left common carotid artery
Left subclavian artery
Functions of the Fibrous epicardium
Anchoring the heart to other structures
Protection
Prevents overfilling of heart
Layers of the Heart
Endocardium
Myocardium
Epicardium
Layers of epicardium
- Visceral epicardium (innermost)
Pericardial cavity - Parietal epicardium
- Fibrous epicardium (outermost)
