Ambulatory BP Monitoring

Blood pressure is measured over a 24-hour period, using auscultatory or oscillometry devices, and requires the use of a cuff. The monitor takes blood pressures every 20 minutes (less frequently overnight – eg, one-hourly).

  • To obtain a twenty-four-hour record – more reliable than one-off measurements. Studies have shown that increased blood pressure readings on ABPM are more strongly correlated to end-organ damage than one-off measurements – eg, left ventricular hypertrophy.
  • To detect white coat hypertension.
  • It has used in hypertension research – eg, reviewing the 24-hour profile of antihypertensive medication.
  • It may have the prognostic use – higher readings on ABPM are associated with increased mortality.
  • Response to treatment.
  • Masked hypertension.
  • Episodic dysfunction.
  • Autonomic dysfunction.
  • Hypotensive symptoms whilst on antihypertensive medications.
  • It may be more cost-effective in the long term than office blood pressure measurement.
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