Wheeler Heart and Vascular Center - Cardiology Address 3800 S. National Ave. Springfield, MO 65807 location Get Directions Phone: 417-875-2620 About Wheeler Heart and Vascular Center is southwest Missouri's premier outpatient facility for diagnostic and minimally invasive cardiac and vascular care with nuclear cardiology, echocardiography and vascular ultrasound, plus innovative programs for heart failure and cardiopulmonary rehab. CoxHealth Sleep Center is an additional clinic located at Wheeler Heart and Vascular Center, on the southeast corner of National and Primrose Avenue in Springfield.