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Keywords:

  • baroreflex failure;
  • tilt-table test;
  • Valsalva's maneuver;
  • cold face test;
  • headache

Two cases of baroreflex failure presented with tension-type/exertional headache. The usefulness of noninvasive physiological tests in diagnosing baroreflex failure and the role of baroreceptors in trigeminal nociception are discussed.