Squiggler

Blackout in a supermarket queue, with no warning

The case

73-year-old man. Blackout in a supermarket queue, with no warning

Hypertension on bisoprolol for years. Donepezil started six weeks ago for early Alzheimer's disease. Two episodes of feeling faint in the last month; this time he went to the floor and came round within seconds, with no confusion afterwards and no tongue biting.

On arrival

HR
52
SpO₂ (%)
97
Respiratory rate
15
Temperature (°C)
36.4
Systolic BP (mmHg)
138
Diastolic BP (mmHg)
76

Stage 1 of 1

Séamus Ó Braonáin is on a monitored bed in the emergency department, fully alert, embarrassed and keen to know when his daughter is arriving. He felt nothing before the blackout and remembers hitting the floor. Examination is normal apart from a bruise on his elbow. This strip printed while the nurse was doing his observations.

The tracing for the quiz “Blackout in a supermarket queue, with no warning”.
Monitor strip from the bedside, 25 mm/s, 10 mm/mV. Open this tracing in the studio
What does the strip show?
Which feature separates it from complete heart block?
What happens next?

Diagnosis

Sinus arrest with junctional escape from rate-limiting drugs

This tracing was generated, not recorded. It opens in the studio with every dial live.

Open the studio

Discussion

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