
3. Lingering Nausea, Indigestion, or Stomach Pressure
Inadequate blood flow to the inferior wall of the heart can directly irritate adjacent diaphragmatic and abdominal nerves. This neurological cross-talk creates sensations that mimic acid reflux, heartburn, or general gastric distress.
If your stomach upset appears alongside mild shortness of breath or cold sweats, treat it as a medical priority. Antacids will not alleviate discomfort caused by reduced coronary circulation.

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