Which of the following best describes the exact criteria for pre-capillary pulmonary hypertension on hemodynamics?

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Multiple Choice

Which of the following best describes the exact criteria for pre-capillary pulmonary hypertension on hemodynamics?

Pre-capillary pulmonary hypertension on hemodynamics means the problem lies in the pulmonary arteries themselves, not in the left heart. You diagnose it by right heart catheterization showing an elevated mean pulmonary arterial pressure while the left-sided filling pressures remain normal. The classic hemodynamic cutoffs are a mean PAP greater than 25 mmHg with a pulmonary capillary wedge pressure (PAWP) of 15 mmHg or less. That combination indicates high pressure in the pulmonary arteries but normal left atrial pressures, pointing to pulmonary vascular disease as the cause. If the wedge pressure is elevated (>15 mmHg), the pattern is post-capillary PH due to left heart disease. If the mean PAP isn’t elevated, there isn’t pulmonary hypertension. In practice, clinicians also consider pulmonary vascular resistance, which is usually increased in pre-capillary PH, but the defining criteria focus on mPAP and PAWP.

Pre-capillary pulmonary hypertension on hemodynamics means the problem lies in the pulmonary arteries themselves, not in the left heart. You diagnose it by right heart catheterization showing an elevated mean pulmonary arterial pressure while the left-sided filling pressures remain normal. The classic hemodynamic cutoffs are a mean PAP greater than 25 mmHg with a pulmonary capillary wedge pressure (PAWP) of 15 mmHg or less. That combination indicates high pressure in the pulmonary arteries but normal left atrial pressures, pointing to pulmonary vascular disease as the cause. If the wedge pressure is elevated (>15 mmHg), the pattern is post-capillary PH due to left heart disease. If the mean PAP isn’t elevated, there isn’t pulmonary hypertension. In practice, clinicians also consider pulmonary vascular resistance, which is usually increased in pre-capillary PH, but the defining criteria focus on mPAP and PAWP.

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