Treatment of choice in a patient of acute pulmonary embolism with right ventricular hypokinesia and a compromised cardiac output but normal blood pressure is:
First, the core concept here is probably about the classification of pulmonary embolism. I think there are different categories: massive PE, submassive PE, and non-massive. Massive PE would have hypotension, right? Submassive might have RV dysfunction but not hypotension. The treatment varies between these groups.
The correct answer is likely one of the options related to submassive PE. The standard treatments for PE are anticoagulation, thrombolytic therapy, or maybe mechanical interventions. For submassive PE, the guidelines might recommend thrombolysis if there's RV dysfunction. But wait, if the patient has hypotension, that's massive PE and needs thrombolytics. Since this patient has normal BP but RV hypokinesia, it's submassive. So the treatment of choice here would be thrombolysis, right? But I need to confirm. Maybe they use thrombolytics in submassive cases to prevent deterioration into shock. So the treatment of choice would be thrombolytic therapy.
Now the options are A to D, but not listed here. Let's assume the options include thrombolytic therapy, anticoagulants, surgical embolectomy, maybe inferior vena cava filter. The correct answer is thrombolytic therapy for submassive PE. The other options: anticoagulation is standard but maybe not enough for submassive. Surgical embolectomy is for massive or when thrombolytics can't be used. IVC filter is for contraindicated anticoagulation. So the answer is thrombolysis.
Clinical pearl: Submassive PE (RV dysfunction without shock) should get thrombolytic therapy to prevent progression to hemodynamic instability. Remember the classification and treatment tiers for PE.
**Core Concept**
This question tests the management of submassive pulmonary embolism (PE), defined by right ventricular (RV) dysfunction and reduced cardiac output without hypotension. The key principle is distinguishing between **massive PE** (shock/hypotension) and **submassive PE** (RV strain without shock), as treatment strategies differ significantly.
**Why the Correct Answer is Right**
Thrombolytic therapy (e.g., alteplase) is the treatment of choice for submassive PE with RV hypokinesia. RV dysfunction in submassive PE indicates significant clot burden and risk of decompensation. Thrombolysis rapidly dissolves clots, reduces RV afterload, and prevents progression to cardiogenic shock. Guidelines (e.g., ESC 2023) recommend thrombolytics for submassive PE with elevated biomarkers (troponin, BNP) or echocardiographic evidence of RV dysfunction.
**Why Each Wrong Option is Incorrect**
**Option A:** Anticoagulation (e.g., heparin) is standard for non-massive PE but insufficient for submassive cases due to delayed clot lysis.
**Option B:** Surgical embolectomy is reserved for massive PE with refractory hypotension