Pulmonary Embolism on Telemetry

A post-op patient had sudden onset of dyspnea and oxygen saturation is low. What is the possible diagnosis?

Figure 1 - 12 lead ECG

Below are the cropped images of the baseline telemetry data and during the symptomatic episode

Figure 2 - Comparison of baseline telemetry vs symptomatic episode

During the symptomatic episode, there is sinus tachycardia (~125 bpm or 1500/12) and there is S wave in lea I and there is a Q wave and T wave inversion in lead III or there is S1Q3T3 pattern. It was confirmed that the patient had pulmonary embolism.

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