Dr. Yasser Mohammed Hassanain Elsayed is a Critical care physician, cardiologist, and researcher (Egyptian Ministry of Health). He obtained MBBch (Al-Azher University) and a PGDip Cardiology (Middlesex University). The researcher has (109) articles and (4) medical books. He has (9) innovative issues; (3) innovative "Signs", (4) "Phenomena", (1) "Modification", and (1) " Maneuver". He has peer-reviewed (142). He was a Speaker at (14) International Conferences. He is an instructor; (6) lectures. He is an editorial member (about 40 medical journals). He was honored for research by several institutes. Research Interest: Critical Care, Emergency, Cardiology, Internal Medicine, Pharmacology, and Toxicology.
Title : Oxygen reversal of coronary artery spasm with modification of international standards for the diagnostic criteria of coronary vasomotor disorders (Yasser's modification or oxygen test)-Retrospective-Observational study; 17-Case reports