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Table 5 Precipitating factors identified in 14 of the 25 reported cases of patients with THARCV syndrome

From: Thunderclap headache attributed to reversible cerebral vasoconstriction: view and review

Precipitating factor

n

%

Sexual intercourse

6

24

Exertiona

5

20

Angiography

2

8

Sneezing

1

4

Exposure to cold

1

4

Total number of patients

14/25

56

  1. aActivities defined as exertion were calisthenics (i.e., sit ups, push-ups, and skipping rope), getting up from bed, straining, bending, swimming, snorkeling, and chasing off and screaming at an attacking dog