WBR0883: Difference between revisions
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{{WBRQuestion | {{WBRQuestion | ||
|QuestionAuthor={{SSK}} (Reviewed by Serge Korjian) | |QuestionAuthor= {{SSK}} (Reviewed by Serge Korjian) | ||
|ExamType=USMLE Step 1 | |ExamType=USMLE Step 1 | ||
|MainCategory=Physiology | |MainCategory=Physiology | ||
| Line 22: | Line 22: | ||
|SubCategory=Cardiology | |SubCategory=Cardiology | ||
|Prompt=A 38 year old woman is undergoing work-up for idiopathic pulmonary hypertension. During pulmonary artery catheterization her cardiologist takes the measurements shown below. What is this patient's estimated cardiac output? <br> | |Prompt=A 38 year old woman is undergoing work-up for idiopathic pulmonary hypertension. During pulmonary artery catheterization her cardiologist takes the measurements shown below. What is this patient's estimated cardiac output? <br> | ||
*''Pulmonary capillary wedge pressure'' = 9 mmHg<br> | |||
*''Right atrial pressure'' = 3 mmHg<br> | |||
''Right atrial pressure'' = 3 mmHg<br> | *''Pulmonary artery pressure'' = 23 mmHg<br> | ||
''Pulmonary artery pressure'' = 23 mmHg<br> | *''AV CO<sub>2</sub> difference'' = 28 ml/m<sup>2</sup><br> | ||
''AV CO<sub>2</sub> difference'' = 28 ml/m<sup>2</sup><br> | *''AV O<sub>2</sub> difference'' = 36 ml/m<sup>2</sup><br> | ||
''AV O<sub>2</sub> difference'' = 36 ml/m<sup>2</sup><br> | *''Rate of O<sub>2</sub> consumption'' = 190 ml/min/m<sup>2</sup> | ||
''Rate of O<sub>2</sub> consumption'' = 190 ml/min/m<sup>2</sup> | |||
|Explanation=Fick's principle is a simple way to calculate cardiac output by using the arteriovenous oxygen difference and rate of oxygen consumption that can be measured during right heart catheterization (pulmonary artery cathterization). The equation used is shown below: | |Explanation=Fick's principle is a simple way to calculate cardiac output by using the arteriovenous oxygen difference and rate of oxygen consumption that can be measured during right heart catheterization (pulmonary artery cathterization). The equation used is shown below: | ||
Latest revision as of 01:59, 28 October 2020
| Author | [[PageAuthor::Serge Korjian M.D. (Reviewed by Serge Korjian)]] |
|---|---|
| Exam Type | ExamType::USMLE Step 1 |
| Main Category | MainCategory::Physiology |
| Sub Category | SubCategory::Cardiology |
| Prompt | [[Prompt::A 38 year old woman is undergoing work-up for idiopathic pulmonary hypertension. During pulmonary artery catheterization her cardiologist takes the measurements shown below. What is this patient's estimated cardiac output?
|
| Answer A | AnswerA::8.26 |
| Answer A Explanation | AnswerAExp::Incorrect |
| Answer B | AnswerB::7.66 |
| Answer B Explanation | AnswerBExp::Incorrect |
| Answer C | AnswerC::7.03 |
| Answer C Explanation | AnswerCExp::Incorrect |
| Answer D | AnswerD::6.78 |
| Answer D Explanation | AnswerDExp::Incorrect |
| Answer E | AnswerE::5.28 |
| Answer E Explanation | AnswerEExp::Correct |
| Right Answer | RightAnswer::E |
| Explanation | [[Explanation::Fick's principle is a simple way to calculate cardiac output by using the arteriovenous oxygen difference and rate of oxygen consumption that can be measured during right heart catheterization (pulmonary artery cathterization). The equation used is shown below:
|
| Approved | Approved::Yes |
| Keyword | WBRKeyword::Fick's principle, WBRKeyword::Cardiac output, WBRKeyword::oxygen consumption, WBRKeyword::right heart catheterization, WBRKeyword::pulmonary artery cathterization |
| Linked Question | Linked:: |
| Order in Linked Questions | LinkedOrder:: |
