venous thrombosis and embolismvenous thrombosis pulmonary embolismpulmonary venous embolismside effects of pulmonary embolismcholesterol embolism symptomscerebral embolism symptomscoronary embolism symptomscardiac embolism symptomsarterial embolism symptomsaortic embolism symptomssaddle embolism symptomsbrain embolism symptoms