> In teaching hospitals, mortality was lower among high-risk patients with heart failure or cardiac arrest admitted during meeting dates (P < .001) No mortality differences existed for low-risk patients in teaching hospitals or high- or low-risk patients in nonteaching hospitals [or high-risk patients with AMI in teaching hospitals]
So in the specific case of teaching hospitals with high-risk patients with heart failure or cardiac arrest, the normal treatment is making things worse.
Outside of that special case, the cardiology meetings don't seem to have any effect (positive or negative). This could mean that the normal treatment is useless. Or it could mean that the hospital is doing a good job of planning around the cardiology meeting -- e.g. delaying non-urgent treatment until the next day, while ensuring there are still enough doctors on staff for the urgent cases.