Domestic Fully Magnetically Levitated Extra VAD Supports Ultra–High-Risk PCI

A tertiary hospital in Suzhou performed a high-risk percutaneous coronary intervention (PCI) supported by the domestically developed MoyoAssist® Extra VAD. The device was used to maintain hemodynamic stability during revascularization in a patient with complex coronary lesions and severe ventricular dysfunction.

Patient Profile

Gender: Male
Medical History: Long-term smoking and alcohol use
Symptoms: Acute myocardial infarction with acute heart failure, dyspnea, chest tightness, hemodynamic instability

Key Findings

• Proximal RCA near-total occlusion

• Severe stenosis at the ostium of the left main coronary artery

• Left ventricular ejection fraction 33%

• Moderate pulmonary hypertension

• Moderate tricuspid regurgitation and severe mitral regurgitation

• Elevated biomarkers: Troponin T 405 pg/mL, BNP 9004 pg/mL

• Chest CT: Enlarged cardiac silhouette, bilateral pleural effusions

• ECG: Sinus tachycardia, ST-T abnormalities

Diagnoses

• Acute myocardial infarction

• Acute heart failure

• High-risk complex coronary artery disease

• Severe left ventricular systolic dysfunction

• Pulmonary hypertension and multi-valvular insufficiency

Procedure Strategy

• Multidisciplinary evaluation involving cardiology, cardiac surgery, critical care, anesthesia, and vascular surgery

• Determination that the patient was intolerant of cardiac surgery

• Decision to perform high-risk PCI under mechanical circulatory support

• Percutaneous insertion of venous cannula via femoral vein–right atrium–interatrial septum–left atrium pathway

• Percutaneous femoral arterial cannulation for arterial outflow

• Activation of MoyoAssist® Extra VAD to provide approximately 2 L/min of flow

• Revascularization strategy: right coronary intervention followed by left main ostial lesion treatment

Postoperative Course

• Transfer to the cardiac intensive care unit for continued management

• Progressive improvement in left ventricular systolic function

• Resolution of dyspnea and exercise limitation

• Decline of Troponin T and BNP toward normal ranges

• Chest CT showing reduced cardiac size and absorption of pleural effusion

• Patient discharged after completion of cardiac rehabilitation

pre-PCI RCA	post-PCI RCA

pre-PCI LCA	post-PCI LCA

Clinical Insights

• Mechanical circulatory support enabled hemodynamic stability during treatment of left main and multivessel high-risk lesions

• MoyoAssist® Extra VAD provided short-term extracorporeal ventricular assistance with favorable hemocompatibility characteristics

• The procedure highlights practical application scenarios for domestically produced extracorporeal VAD systems in high-risk PCI

• Further clinical verification is required for long-term outcomes and broader indications