Kratom Linked to Rare Acute Right Ventricular Failure in Published Cardiology Case Report

Why it matters

Most kratom cardiovascular warnings focus on arrhythmias and QT prolongation — this JACC case documents isolated right ventricular failure requiring ICU-level intervention, expanding the known cardiovascular risk profile of kratom.

The big picture

Kratom cardiovascular risks have been a growing clinical concern, with prior reports linking it to Brugada pattern, ventricular fibrillation, and QT prolongation. This case adds acute right ventricular failure to the spectrum — a pattern distinct from typical opioid toxicity and more consistent with kratom's combined opioid-adrenergic mechanism. It underscores that clinicians should consider kratom exposure when evaluating unexplained right heart failure.

Key findings

• A 52-year-old man using kratom for anxiety presented in shock with multiorgan failure including acute kidney and liver injury
• Echocardiography showed severe right ventricular dilation with McConnell's sign — typically associated with massive pulmonary embolism — but CT ruled out clot
• Right heart catheterization confirmed elevated right-sided pressures and high cardiac output consistent with high-output right ventricular failure
• All other causes of high-output heart failure (thyrotoxicosis, AV fistula, liver disease, thiamine deficiency, infection) were systematically excluded
• Patient recovered with inotropic support and was discharged without medications after abstaining from kratom

What they say

"This case emphasizes the importance of recognizing Kratom as a potential factor in unexplained acute RV dysfunction," the authors wrote in JACC Case Reports, adding that it expands "the clinical spectrum of Kratom's cardiovascular toxicity."

Bottom line

Kratom can cause acute, reversible right ventricular failure — a life-threatening complication that can mimic pulmonary embolism and requires prompt echocardiographic evaluation.