WorksheetsArterial Supply of the Heart
Total questions: 10
Worksheet time: 5mins
A patient develops bradycardia due to ischemia of the AV node. Which artery most commonly supplies this node?
Left coronary artery
Circumflex branch of LCA
Left marginal artery
Right coronary artery
In left coronary dominance, which artery supplies the posterior interventricular groove?
Right coronary artery
Left anterior descending artery
Circumflex branch of LCA
Left marginal artery
An anterior wall myocardial infarction is most often due to occlusion of which artery?
Right coronary artery
Left anterior descending artery
Circumflex artery
Right marginal artery
A sudden blockage of the RCA near its origin will compromise blood supply to which of the following structures?
Left ventricle
Anterior interventricular septum
Right atrium and SA node
Left atrium and AV bundle
The artery most commonly referred to as the "widow maker" due to its involvement in fatal anterior MI is:
Right coronary artery
Circumflex artery
Left anterior descending artery
Left marginal artery
A patient with inferior wall MI shows ischemia of the diaphragmatic surface of the ventricles. Which artery is likely occluded in a right dominant circulation?
Left marginal artery
Posterior interventricular branch of RCA
Anterior interventricular artery
Circumflex artery
Which artery supplies the anterior 2/3 of the interventricular septum, including the bundle branches?
Circumflex artery
Left anterior descending artery
Right marginal artery
Posterior interventricular artery
In a patient with angina radiating to the left arm, the referred pain occurs due to which nerve connection?
Phrenic nerve
Intercostobrachial nerve
Long thoracic nerve
Median nerve
During a coronary angiogram, contrast injection reveals occlusion at the left sinus of Valsalva. Which artery is directly affected?
Right coronary artery
Left coronary artery
Non-coronary sinus artery
Posterior interventricular artery
A blockage in the circumflex artery would most directly impair perfusion to which cardiac region?
Right atrium
Left atrium and left ventricle (lateral wall)
Right ventricle
Interventricular septum (anterior part)
