Respiratory failure (low arterial PO2; raised arterial PCO2) leads to�

1.	Respiratory failure (low arterial PO2; raised arterial PCO2) leads to A. Raised pulmonary artery pressure (pulmonary hypertension). B. Right ventricular failure. C. Low voltage P waves in the electrocardiogram. D. Decreased cerebral blood flow. E. Warm hands and feet.
Answer» A. True Hypoxia causes generalized pulmonary vasoconstriction. B. True Pulmonary hypertension can lead to right ventricular failure (‘cor pulmonale’). C. False Atrial hypertrophy in cor pulmonale results in prominent P waves. D. False CO₂ dilates cerebral blood vessels. E. True CO₂ is a vasodilator and ‘cor pulmonale’ is a ‘high output’ failure.

Respiratory failure (low arterial PO2; raised arterial PCO2) leads to A. Raised pulmonary artery pressure (pulmonary hypertension). B. Right ventricular failure. C. Low voltage P waves in the electrocardiogram. D. Decreased cerebral blood flow. E. Warm hands and feet.

Answer»

A. True Hypoxia causes generalized pulmonary vasoconstriction.

B. True Pulmonary hypertension can lead to right ventricular failure (‘cor pulmonale’).

C. False Atrial hypertrophy in cor pulmonale results in prominent P waves.

D. False CO₂ dilates cerebral blood vessels.

E. True CO₂ is a vasodilator and ‘cor pulmonale’ is a ‘high output’ failure.

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Respiratory failure (low arterial PO2; raised arterial PCO2) leads to A. Raised pulmonary artery pressure (pulmonary hypertension). B. Right ventricular failure. C. Low voltage P waves in the electrocardiogram. D. Decreased cerebral blood flow. E. Warm hands and feet.

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