Dyspnea, tachypnea and pleuritic chest pain are classic characteristics of pulmonary embolism.The diagnosis is facilitated when a patient with a risk factor presents with classic symptoms and signs.

• 若病患有栓塞的危险因子，且出现典型的临床症状如呼吸困难、呼吸急促及肋膜性胸痛时，诊断较为容易；