“A Case of Massive Pulmonary Embolism with Cardiac Arrest Treated with life-saving Emergency Thrombosis despite Recent Major spinal Surgery: Dealing Acute Right Ventricular Failure through Passive Leg Raising Test”, Ibrahim card. med. j., vol. 1, no. 2, pp. 62–66, Jan. 2013, doi: 10.3329/icmj.v1i2.13564.