Determinants of Myocardial Oxygen Supply in Cardiology
16 Questions
1 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

Which vessel originates from the left sinus of Valsalva?

  • Left anterior descending coronary artery (LCA)
  • Circumflex coronary artery (Cx)
  • Left main coronary artery (LMCA) (correct)
  • Right coronary artery (RCA)
  • What does the right coronary artery primarily supply?

  • Lateral wall of the left ventricle
  • Right ventricle and posterior septum (correct)
  • Interventricular septum
  • Anterior wall of the left ventricle
  • Which vessel typically supplies the lateral wall of the left ventricle?

  • Left anterior descending coronary artery (LCA)
  • Right coronary artery (RCA)
  • Circumflex coronary artery (Cx) (correct)
  • Left main coronary artery (LMCA)
  • What is the principal mechanism of metabolic regulation for coronary resistance?

    <p>Endothelial regulation</p> Signup and view all the answers

    Which factor directly affects coronary blood flow according to the text?

    <p>Coronary resistance</p> Signup and view all the answers

    What is responsible for autoregulation of coronary resistance?

    <p>Myogenic factors</p> Signup and view all the answers

    In clinical terms, how many coronary arteries are typically considered despite actual anatomical distinctions?

    <p>Three</p> Signup and view all the answers

    Where does the right coronary artery originate from?

    <p>Right cusp of the aortic valve</p> Signup and view all the answers

    During which phase of the cardiac cycle is coronary flow to the left ventricle almost entirely diastolic?

    <p>Systole</p> Signup and view all the answers

    What happens to myocardial flow during systole?

    <p>Falls close to zero</p> Signup and view all the answers

    Which vessels are categorized as resistance vessels in the context of coronary circulation?

    <p>Arterioles and capillaries</p> Signup and view all the answers

    What structures can dramatically change their diameter to regulate the flow through coronary capillaries?

    <p>Precapillary sphincters</p> Signup and view all the answers

    What is the approximate ratio of capillaries to myocytes in the rich network of capillaries in the heart?

    <p>1:1</p> Signup and view all the answers

    In pathological narrowing of epicardial conductance arteries, what happens to the endocardial flow in comparison to the epicardial flow?

    <p>Decreases</p> Signup and view all the answers

    Which structure eventually empties into the right atrium after receiving coronary veins along with the SA and AV nodes?

    <p>Great cardiac vein</p> Signup and view all the answers

    What can dramatically change their diameter in response to numerous stimuli to regulate the flow through coronary capillaries?

    <p>Arterioles</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Browser