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Autonomic Nervous System Testing – Ewing’s Test - Evaluation of POTS or Dysautonomia
Reveal the Hidden Cause Behind Fatigue, Dizziness, and Heart Palpitations
What Is Ewing’s Test?
- Sympathetic ("fight or flight")
- Parasympathetic ("rest and digest")
What to Expect: The Ewing Maneuvers
You will breathe slowly and evenly (about 6 breaths per minute) while we monitor your heart rate. In a healthy nervous system, your heart rate should naturally rise with inhalation and fall with exhalation—a phenomenon called respiratory sinus arrhythmia. This maneuver assesses parasympathetic tone by monitoring how your heart rate changes in response to slow, paced breathing. A healthy nervous system should show natural variability between inhalation and exhalation, known as respiratory sinus arrhythmia. Blunted variability can indicate parasympathetic dysfunction.
You’ll be asked to blow into a closed system (like a syringe or mouthpiece) for 15 seconds, simulating a strong exhalation against resistance. This challenges both sympathetic and parasympathetic branches and helps evaluate baroreflex sensitivity—your body’s ability to stabilize blood pressure and heart rate under stress.
This test evaluates your body’s sympathetic regulation under gravitational stress and can detect POTS or orthostatic hypotension. This test assesses your sympathetic nervous system’s response to a change in posture. As you move from lying down to standing, we monitor your heart rate and blood pressure. In healthy individuals, the body compensates quickly. In those with dysautonomia, symptoms like dizziness, tachycardia, or a drop in blood pressure may occur.
Powered by Kubios HRV Premium: Scientific-Grade Analysis
- Time-domain and frequency-domain HRV parameters (like RMSSD, SDNN, LF/HF ratio)
- Baroreflex sensitivity—an important biomarker of cardiovascular resilience
- Poincaré plots and nonlinear metrics—for visualizing patterns of dysfunction
- Kubios ANS Index—a summary of your autonomic balance, integrating multiple variables into a single score
Why This Matters
Your autonomic nervous system plays a central role in your energy, circulation, sleep, digestion, and mood. When it’s off-balance, your entire well-being can be affected. Early detection of autonomic dysfunction can significantly improve outcomes for patients struggling with vague or unexplained symptoms. Ewing’s Testing provides vital insight into how your nervous system is functioning and offers a clear direction for holistic treatment strategies—from hydration and lifestyle support to targeted supplements and mind-body therapies.
If you’re experiencing lightheadedness, fatigue, rapid heart rate, or have been told your tests are “normal” despite persistent symptoms, this advanced testing could offer the clarity you need.
Through this testing, we can:
- Identify hidden imbalances
- Tailor treatment strategies (hydration, nutrition, movement, nervous system retraining)
- Track your progress with objective biomarkers
- Support your recovery from chronic illness or dysautonomia-related conditions
Schedule your Autonomic Nervous System Evaluation today and take the first step toward healing from the inside out and restoring balance and vitality.