Coronary artery aneurysms: the chest pain "zebra".

Coronary artery aneurysms (CAAs) are defined as entire wall dilatation to 1.5 times the size of the adjacent normal vessel. They can present as chest pain with electrocardiogram (ECG) changes, mass effects or rupture with tamponade.

The challenge of improving donor heart preservation.

Heart transplantation has in recent years become the treatment of choice for end stage heart failure. However while the waiting list for transplantation is growing steadily, the donor pool is not increasing. Therefore, in order to meet demand, transplant programs are using older, "marginal donors" and accepting longer ischaemic times for their donor hearts.