Which is false about pulmonary embolism?

Dysponea is the commonest symptom and tachyponea is the commonest sign. The most common presenting symptom of pulmonary embolism is dyspnea. Dyspnea, pleuritic chest pain, and tachypnea were present in 97% of patients with pulmonary embolism. PE most commonly results from deep vein thrombosis. Clinical signs include low blood oxygen saturation and cyanosis, rapid breathing, and a rapid hea rate, left parasternal heave, a loud pulmonary component of the second hea sound, and raised jugular venous pressure.