Pulmonary embolism (PE) is blood clot that occurs in lung, it is common and potentially fatal disorder as it can damage part of lung due to restricted blood flow and decreased oxygen level in the blood, so early diagnosis is effective and improves the chance of survival (Elizabeth K et al., 2018). PE is the third most common acute cardiovascular disease after myocardial infarction and stroke and it leads to thousands of deaths each year because it often goes undetected (Laack TA et al., 2004). Early diagnosis and treatment of PE are essential for optimizing clinical outcomes (Elizabeth K et al., 2018).

.