QuestionSBA
QuestionChoice
This presentation is most likely to be a pulmonary embolism (PE). ST depression is not an ECG finding typically seen in PE. It is indicative of cardiac ischaemia.
10007560
e
ST depression
QuestionChoice
The presence of U waves on ECG is characteristic of hypokalaemia. U waves would be seen as a deflection immediately following the T wave. Hypokalaemia may present with symptoms such as muscle cramps, dizziness, polyuria, polydipsia, and in severe cases, arrhythmias. This history gives no indication of hypokalaemia. This presentation is most likely to be a pulmonary embolism (PE).
10007558
c
U waves
QuestionChoice
This is a relatively uncommon ECG finding in PE, only presenting in around 20% of patients. An ECG finding of sinus tachycardia is a more likely finding.
10007557
b
S1Q3T3
QuestionChoice
This presentation is most likely to be a pulmonary embolism (PE). T wave inversion is not an ECG finding typically seen in PE. It is indicative of cardiac ischaemia, past or present.
10007559
d
T wave inversion
QuestionChoice
This presentation is most likely to be a pulmonary embolism (PE). Sudden onset shortness of breath, pleuritic chest pain and haemoptysis is the typical triad for a PE in exam questions. The most common finding on ECG in a PE is sinus tachycardia. The classic S1Q3T3 (deep S waves in lead I, pathological Q waves in lead III, and inverted T waves in lead III) is uncommon, presenting in around 20% of patients.
10007556
a
Sinus tachycardia
Concept
Chapter
2693
3724
Pulmonary Embolism
Topic
132
Respiratory
14058
A 28-year-old man presents to the emergency department with pleuritic chest pain and shortness of breath that began 6 hours ago. On further questioning, he also reports bringing up small flecks of bright red blood when coughing. He has recently begun a course of chemotherapy for renal carcinoma.

On examination, he has a heart rate of 107 and respiratory rate of 20. His oxygen saturations are 88%.

Which of the following ECG findings is the most likely to be seen?
a