Stress Test

Another one from Mattu’s Feb review. This article compares psychological stress to physical stress to detect effects on perfusion of the heart. Interestingly mental stress causes ischemia where physical stress does not seem to.

There has always been an intuitive relationship between psychological stress and myocardial ischemia. Bernard Lown, a famous cardiologist, said in EVERY MI patient he had he would find a recent large social stressor in the patient. Of course plenty of hindsight bias occurs here.

Either way, if nothing else with this article remember that emotional stress causing chest pain COUNTS AS exertional ischemic symptoms. The fight with the boyfriend or girlfriend does not allow for blaming the pain on “anxiety.” And perhaps the real stress test in our Chest Pain Center is the 20 hours of sleep deprivation coupled with exposure to yelling, retching and dying that our patients must undergo to make it upstairs for a nice quiet little stroll on the treadmill.

Death of CK-MB?

Hey guys here is a relevant (albeit 7 years old) article supporting my abandonment of the CK-MB. I had heard Mattu talk about this on some podcasts but this article (along with some newer ones) is the evidence to support that practice. At Jewish I do not obtain a CKMB though when I want a total CK I now have to remember up front. On the POC machines at Jewish the Trop alone seems to error far less than when CKs are running with it. Still watch out for the Trop false positives.

Also I would plug Dr Mattu’s new ECG site. Now he charges a small fee (can pay weekly or monthly but I did the $27/year). Still video based (I prefer to just read a blog with pics) but top notch quality. There is a weekly case and a monthly lit review. The above article is in his Feb review. Might make a one month subscription part of the ECG month. ECGs of course are learned over years and decades, not in a month long elective.