Low Blood Pressure
Extensive or repeated pulmonary embolism results in severe systemic hypotension which causes the patient to faint and feel dizzy. Low blood pressure occurs unpredictably due to extensive blockage of blood vessels in lungs and appears in a frequent manner. The systemic low blood pressure reaction appearing due to pulmonary embolism is the clear indication of minimized cardiac output. There is a more decrease in systemic arterial resistance as the response of vasomotor system is increasing against pulmonary embolism. One of the most commonly occurring causes of death in pulmonary embolism patients is the severe system drop in blood pressure.