Term
| SA and AV nodes usually supplied by what? |
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Definition
| Right Coronary artery; Infarct may cause nodal dysfunction (bradycardia or heart block) |
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Term
| Describe right dominant circulation |
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Definition
85% of people have right dominant coronary circulation
Posterior descending artery arises from right coronary artery |
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Term
| Describe left dominant circulation |
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Definition
8% of people have left dominant coronary circulation
Posterior descending artery arises from left circumflex artery. |
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Term
| Describe codominant circulation |
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Definition
7% of peopl have codominant coronary circulation
Posterior descending artery arises from both left circumflex and right coronary arteries. |
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Term
| When is coronary blood flow highest? |
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Definition
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Term
| What is the most posterior portion of the heart? Enlargement can cause what? |
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Definition
Most posterior portion is the left atrium.
Enlargement can cause dysphagia (compression of esophagus) or hoarseness (due to compression of the left recurrent laryngeal nerve, a branch of vagus) |
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Term
| Describe the layers of the pericardium |
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Definition
Outer - Fibrous pericardium
Middle - Parietal pericardium
Inner - Visceral pericardium |
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Term
| In what layer of the pericardium does the pericardial cavity lie? |
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Definition
| Between parietal and visceral layers. |
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