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Left Main Coronary Artery Compression in Pulmonary Hypertension: Value of Multimodality Imaging in Diagnosis and

Leticia Barrios1, Marion Delcroix, Steven Dymarkowski

  • 1Department of Cardiovascular Diseases, University Hospitals Leuven, Leuven, Belgium. leticia.barrios@uzleuven.be.

The Journal of Invasive Cardiology
|December 8, 2022
PubMed

Insights

Pulmonary hypertension can cause left main coronary artery (LMCA) extrinsic compression. Diagnosis requires coronary angiography and intracoronary imaging, revealing significant stenosis in 40% of patients with angina.

Area of Science:

  • Cardiology
  • Pulmonology
  • Medical Imaging

Background:

  • Pulmonary hypertension (PH) is a severe condition characterized by high blood pressure in the pulmonary arteries.
  • Left main coronary artery (LMCA) extrinsic compression is a potential complication, particularly in patients with PH.
  • Angina symptoms in PH patients may indicate underlying coronary artery issues.

Observation:

  • A prospective study investigated LMCA extrinsic compression in patients with PH.
  • Coronary angiography and intracoronary imaging were used to assess LMCA stenosis.
  • The study focused on the prevalence of significant LMCA stenosis (>50%) due to a dilated pulmonary artery.

Findings:

  • A significant LMCA stenosis (>50%) was found in 6% of the pulmonary arterial hypertension (PAH) population.
  • The prevalence of significant LMCA stenosis increased to 40% in patients experiencing angina-like symptoms.
  • Dilated pulmonary artery-induced extrinsic compression was identified as the cause of LMCA stenosis.

Implications:

  • Early suspicion of LMCA extrinsic compression is crucial for PH patients presenting with angina.
  • Coronary angiography and intracoronary imaging are essential diagnostic tools for confirming LMCA stenosis.
  • Accurate diagnosis and targeted therapy are vital for managing LMCA extrinsic compression in this patient cohort.

Keywords:
cardiac imagingpulmonary hypertension

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