hard · NCLEX-RN risk-reduction

Which clinical hypothesis has the highest priority and demands immediate nurse-initiated intervention? Apply the response specifically to this case: central venous catheter removal complicated by suspected venous air embolism requiring site occlusion, left-lateral head-down positioning when tolerated, oxygen, and emergency escalation.

1. Right ventricular outflow tract obstruction due to a suspected venous air embolism
2. Impaired alveolar gas exchange due to acute post-surgical pulmonary atelectasis
3. Myocardial oxygen demand-supply mismatch due to acute cardiogenic shock
4. Right-sided heart failure secondary to chronic pulmonary arterial hypertension

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