Cardiovascular anatomy Flashcards
What is the blood supply of the SA Node?
Commonly supplied by RCA (blood supply independent of dominance)
What is the blood supply of the AV Node?
Supplied by the PDA
Describe effects of PDA infarct
Infarct may cause AV nodal dysfunction (bradycardia or heart block)
Describe the prevalence and features of a right-dominant circulation
85% of people PDA arises from RCA
Describe the prevalence and features of a left-dominant circulation
8% of people, PDA arises from LCX
Describe the prevalence and features of a Codominant circulation
7% of people, PDA arises from both LCX and RCA
What is the most common site of coronary artery occlusion?
Coronary artery occlusion most commonly occurs in the LAD
When does coronary blood flow peak?
Coronary blood flow peaks in early diastole
The left circumflex coronary artery supplies?
Supplies lateral and posterior walls of left ventricle, anterolateral papillary muscle
LCX AKA
Left circumflex coronary artery
LAD AKA
Left anterior descending coronary artery
LAD supplies
Anterior 2/3 of interventricular septum, anterolateral papillary muscle, anterior surface of the left ventricle
PDA AKA
Posterior descending/interventricular artery
PDA supplies
AV node, posterior 1/3 of interventricular septum, posterior 2/3 walls of ventricles and posteromedial papillary muscle
Right acute marginal artery supplies
Right ventricle
What is the most posterior part of the heart?
Left atrium
Left atrial enlargement can cause?
Dysphagia, (due to compression of the esophagus), or hoarseness (due to compression of the left recurrent laryngeal nerve, a branch of the vagus nerve)
What are the layers of the pericardium?
From outer to inner Fibrous pericardium Parietal layer of serous pericardium Visceral layer of serous pericardium
Where is the pericardial cavity?
Lies between parietal and visceral layers of the pericardium
Innervation of the pericardium
Phrenic nerve