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Acute cor pulmonale — Clinical Guidelines

Overview

Acute cor pulmonale refers to the impairment of right ventricular function secondary to acute pulmonary embolism (APE), often characterized by elevated pulmonary pressures and potential systemic hemodynamic compromise. 1 3

Diagnosis

Clinical Presentation: Symptoms may include dyspnea, chest pain, and signs of right heart strain.

Echocardiography: Key tool for detecting right ventricular dysfunction; notable for mid-free wall akinesia with preserved apex motion in APE 3.

Laboratory Tests: Elevated cardiac troponin levels and markers of renal dysfunction (e.g., elevated BUN, decreased eGFR) can indicate severity 1.

Hemodynamic Monitoring: Assess pulmonary artery pressure and cardiac output for hemodynamic instability.

Management

Anticoagulation: Initiate with parenteral anticoagulants (e.g., unfractionated heparin, LMWH) followed by oral anticoagulation (e.g., warfarin, DOACs) 1.

Thrombolysis: Consider in massive PE with hemodynamic instability, guided by risk-benefit assessment 1.

Vasodilators: Sildenafil may improve hemodynamics; combination with iNOS inhibition requires further study 2.

Supportive Care: Mechanical ventilation, vasopressors, and monitoring for renal dysfunction are crucial 1.

Special Populations

Renal Dysfunction: Close monitoring of renal function markers (eGFR, BUN) is essential due to increased prognostic risk 1.

Elderly: Higher risk of adverse outcomes; careful assessment and management of comorbidities are necessary 1.

Key Recommendations

Monitor Renal Function: Regular assessment of eGFR and BUN in patients with APE to guide prognosis and management (Evidence: Moderate) 1

Echocardiographic Evaluation: Utilize echocardiography to identify regional right ventricular dysfunction patterns for diagnosis and monitoring (Evidence: Moderate) 3

Initiate Prompt Anticoagulation: Start with parenteral anticoagulation followed by oral anticoagulation to prevent further clot propagation (Evidence: Strong) 1

References

1 Altınsoy B, Öz İİ, Örnek T, Erboy F, Tanrıverdi H, Uygur F et al.. Prognostic Value of Renal Dysfunction Indicators in Normotensive Patients With Acute Pulmonary Embolism. Clinical and applied thrombosis/hemostasis : official journal of the International Academy of Clinical and Applied Thrombosis/Hemostasis 2017. link 2 Dias-Junior CA, Neto-Neves EM, Montenegro MF, Tanus-Santos JE. Hemodynamic effects of inducible nitric oxide synthase inhibition combined with sildenafil during acute pulmonary embolism. Nitric oxide : biology and chemistry 2010. link 3 McConnell MV, Solomon SD, Rayan ME, Come PC, Goldhaber SZ, Lee RT. Regional right ventricular dysfunction detected by echocardiography in acute pulmonary embolism. The American journal of cardiology 1996. link00339-6) 4 Reeves WC, Demers LM, Wood MA, Skarlatos S, Copenhaver G, Whitesell L et al.. The release of thromboxane A2 and prostacyclin following experimental acute pulmonary embolism. Prostaglandins, leukotrienes, and medicine 1983. link90104-x)

Acute cor pulmonale