Holter monitor
There is significant scope of misdiagnosis of RS. Diagnosis of RS usually starts with a cardiac workup, as the gastric symptoms may go unnoticed, the cardiac symptoms are scary and can be quite severe. After an EKG, Holter monitor, tilt test, cardiac MRI, cardiac CT, heart catheterization, EP study, echo-cardiogram, and extensive blood work, and possibly a sleep study, a cardiologist may rule out a heart condition.