Cardial
The medical term for something of cardiac origin is "cardiac." This refers to any condition or symptom that originates from the heart.
Cardiac auscultation is the medical term meaning listening to the heart.
cardiac surgery
A Cardiac Surgeon
In Situ
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Psychogenic means of mental origin or causation
There is no single term but a good sentance would be "cardiac conductance disorder"
Cardiac catheterization si the medical term meaning passing a tube through a vessel into the heart.
Proximal means nearer the point of origin.
The insertion is the end of the muscle. The origin is the beginning.
My favorite is "idiopathic", but "cryptogenic" is also correct.
You have described a cardiac stress test.