Today I had a ECG stress test on a treadmill and after only two and a half minutes my BP went from 140/67 to 236/51. Has anyone heard of it being so high and with such a difference in systolic over diastolic? The diastolic actually dropped while still exercising. I am told to get an echocardiagram stress test now to determine if it is extreme hypertension rather than CAD. Has anyone else had this? Could it be chiari related. I am thinking my problems are heart related rather than chiari related now, but lucky me, it could be both I suppose.