Q. What is ST depression at rest?
As early as 1965 Ostrand called attention to the syndrome of short PR interval without accelerated conduction and it's association with ST depression in normal individuals. When patients who have a low probability of coronary disease have modest ST depression at rest, a short PR interval should be looked for. If found it may be evidence to support the expectation that there is no ischaemia. This may be due to the exaggerated influence of atrial repolarization.