Symptoms can be as follows. They are periodic, and occur only during an "episode", usually after eating. * Sinus bradycardia * Difficulty inhaling * Angina pectoris * Left ventricular discomfort * Fatigue * Anxiety * Uncomfortable breathing * Poor perfusion * Muscle pain (crampiness) * Burst or sustained vertigo or dizziness * Sleep disturbance (particularly when sleeping within a few hours of eating, or lying on the left side) * Extrasystoles * Hot flashes * Tachycardia Mechanical Mechanically induced RS is characterized by pressure in the epigastric and left hypochondriac region. Often the pressure is in the fundus of the stomach, esophagus or distention of the bowel. It is believed this leads to elevation of the diaphragm, and secondary displacement of the heart. This reduces the heart's ability to fill and increases the contractility of the heart to maintain homeostasis. Neurological The cranium dysfunction mechanical changes in the gut can compress the vagus nerve at any number of locations along the vagus, slowing the heart. As the heart slows, autonomic reflexes are triggered to increase blood pressure and heart rate. This is complemented by gastro-coronary reflexes whereby the coronary arteries constrict with "functional cardiovascular symptoms" similar to chest-pain on the left side and radiation to the left shoulder, dyspnea, sweating, up to angina pectoris -like attacks with extrasystoles, drop of blood pressure, and tachycardia (high heartbeat) or sinus bradycardia (heartbeat below 60). Typically, there are no changes/abnormalities related in the EKG detected. This can actually trigger a heart attack for persons with cardiac structural abnormalities i.e. coronary bridge, missing coronary, and atherosclerosis. If the heart rate drops too low for too long, catecholamines are released to counteract any lowering of blood pressure. Catecholamines bind to alpha receptors and beta receptors, decreasing vasodilation and increasing contractility of the heart. Sustaining this state causes heart fatigue which results in fatigue and chest pain.
Roemheld syndrome
Larsen syndrome
Bogart–Bacall syndrome
Jeavons syndrome
Michels Caskey syndrome
McGillivray syndrome
Havana syndrome
Zechi-Ceide syndrome