Koléni Health was built to bring the precision of acute-care medicine to the practice of preventing it. Dr. Kabir Rezvankhoo is triple board-certified in Emergency Medicine (ABEM), Critical Care Medicine (ABIM), and Neurocritical Care (ABPN), and credentialed in adult echocardiography.
This combination is rare.
Most physicians who reach this depth of training spend their careers managing complex critical illness. Dr. Rezvankhoo spent fifteen years doing exactly that — then chose to apply those lessons forward.
Emergency Medicine Residency, New York-Presbyterian — Columbia & Weill Cornell, 2007–2011 (Chief Resident)
Emergency Medicine Residency, New York-Presbyterian — Columbia & Weill Cornell, 2007–2011 (Chief Resident)
Emergency Medicine Residency, New York-Presbyterian — Columbia & Weill Cornell, 2007–2011 (Chief Resident)
For four years, Dr. Rezvankhoo served as Medical Director of a high-acuity Intensive Care Unit, leading two clinical programs that defined the unit’s reach.
The first was a Mechanical Circulatory Support program for patients in the most acute stages of heart failure — those requiring ECMO or Impella support during the period when survival depends on mechanical assistance. He organized a multidisciplinary team across the hospital system, ensuring that community hospital patients had access to capabilities typically reserved for academic medical centers. In partnership with cardiovascular surgery, he built the framework for a high-risk CABG program — developing the ICU’s capacity to manage Impella 5.5 ventricular-assisted cardiac surgeries and securing ELSO certification of staff.
The second was the standardization of neurocritical care for stroke and aneurysmal subarachnoid hemorrhage — the protocols, the ENLS certification of staff, and the consistent application of best practices in the ICU that allowed for the creation of a comprehensive stroke system.
In the end, the cardiac and cerebrovascular events most longevity practices aim to prevent are the same events he managed in their final, life-threatening forms.
Modern healthcare is structurally unable to deliver preventive medicine well. Large systems are built around volume and acuity — the economics require it. The patients who need sustained clinical attention the most are the ones the system has the least time for.
In the ICU, care is reactive. By the time a patient arrives, most of the leverage is gone.
Koléni Health applies acute-care precision before the crisis arrives — with a different structure, a different rhythm, and a different relationship to time than the system that produced him.
Underneath the credentials, his deeper interest has always been human performance — how the body adapts, recovers, and sustains itself under load. VO₂ max, lactate kinetics, cardiac output, the physiology of endurance. He completed Ironman California in 2025, and the science behind that race is the same science behind longevity.
Clients of Koléni Health work with a physician whose training was forged in the management of complex critical illness and whose practice is organized around preventing it. This is clinical-performance medicine — acute-care precision applied to long-term health and human performance.
