Dr. Sam Zeraatian

A redo Bentall operation for right coronary artery (RCA) ostial insufficiency represents one of the most technically demanding scenarios in complex aortic root surgery. This condition typically arises from progressive ostial stenosis, kinking, pseudoaneurysm formation, or patch dehiscence following a prior composite valve–graft root replacement, leading to myocardial ischemia, ventricular..

Ex Vivo Lung Perfusion (EVLP) has become a key strategy to assess, recondition, and safely transplant lungs from DCD (Donation after Circulatory Death) donors, particularly because of warm ischemia exposure. Below is a practical, clinically oriented guide focused on how to use EVLP after DCD, with protocols and critical parameters..

An on-pump veno-arterial (VA) ECMO strategy allows safe stabilization and preparation of a lung-less patient while awaiting immediate implantation of the recipient graft. Following bilateral pneumonectomy, VA ECMO provides full cardiopulmonary support, maintaining systemic perfusion and oxygen delivery while unloading the right ventricle and preventing hemodynamic collapse. This approach enables..

LVAD Implantation in Pediatric Population inflow from LV and outflow to Ascending Aorta.   LVAD Implantation in the Pediatric Population   By Sam Zeraatiannejaddavani, MD   ⸻   A — Assessment & Indications   1. Clinical Indications •Refractory Stage D heart failure despite optimal medical therapy (NYHA IV / INTERMACS..

How to Prime an EVLP device from A to Z with back table LA and PA cuff srcuring and Dextran Priming as well connecting to EVLP.   Dr.Sam Zeraatian Nejad Davani,Cardiovascular and Transplant surgeon. Advanced Fellow of Thoracic Organs Transplantation Chicago Illinois.                ..

  Cardiopulmonary bypass is established following systemic heparinization to achieve an activated clotting time greater than four hundred and eighty seconds. Arterial cannulation is performed in the ascending aorta, while venous drainage is obtained using either bicaval cannulation or a single right atrial cannula, depending on exposure and surgeon preference...

I. PRE-PROCUREMENT PREPARATION (DCD CONTEXT)   1. Donor Selection and Planning •Confirm controlled DCD donor (Maastricht Category III). •Review: •Warm ischemic time (WIT) thresholds •Functional warm ischemia (fWIT) •Hemodynamics prior to WLST •Bronchoscopy and chest imaging •Cardiac echo and coronary risk profile •Confirm: •TransMedics OCS Heart primed and functional •EVLP..

  Algorithmic Step-by-Step Technique for Combined Heart and Lung Procurement Technique of Dr. Sam Zeraatiannejaddavani, MD ⸻ I. Fundamental Principles Combined heart and lung procurement is a physiology-driven, time-sensitive operation in which preservation of microvascular integrity is paramount. The operative strategy prioritizes hemodynamic stability, controlled ischemia, lung-protective ventilation, and precise..

Scientific Explanation of Tetralogy of Fallot With Pulmonary Atresia and the Therapeutic Role of Dr. Sam Zeraatian-Nejad Davani 1. Introduction to the Disease: Tetralogy of Fallot (TOF) Tetralogy of Fallot is a cyanotic congenital heart defect characterized by four key components: 1. Large Ventricular Septal Defect (VSD) – allowing blood..

En-bloc Heart–Liver Procurement 1. Exposure and Preparation The procedure begins with a midline sternotomy extended into a midline laparotomy, allowing simultaneous access to both the thoracic and abdominal cavities. The pericardium is opened widely and suspended, while the liver is mobilized by dividing the falciform ligament and exposing the suprahepatic..