Severe paroxysmal hypertension induced by a subconscious Valsalva-like manoeuvres.

We describe the case history of a 32 year old male with severe paroxysmal hypertensive spikes when there was an increase in diastolic blood pressure to 150-200 mmHg. These spikes occurred during rest and especially during modest exercise. They were associated with headache and dyspnoea and were resistant to antihypertensive medication. After 5 years of observations and investigations he underwent further 24-h intra-arterial blood pressure monitoring and physiological testing. The 24-h blood pressure profile was near normal at rest. The observed hypertensive spikes seemed to be induced by involuntary Valsalva-like manoeuvres. This had not been detected previously by the investigators and the patient was unaware of inducing these manoeuvres.