Comparing the Effects of Electronic Cigarette Vapor and Cigarette Smoke in a Novel In Vivo Exposure System.

Electronic cigarettes (E-cigarettes) are being widely used, and growing in popularity. It is estimated that more than 9 million adults use them regularly. The potential adverse health effects of electronic cigarette vapor (E-vapor) exposure are poorly defined.

Effects of stretch or distention on phenylephrine-induced constriction of human coronary artery bypass grafts.

Objective: To determine the effects of grafting saphenous veins into the arterial circulation and to compare the responsiveness of saphenous veins and mammary arteries to vasoconstrictors (phenylephrine or potassium) and a vasodilator (the calcium antagonist isradipine).

Design: Prospective, controlled, in vitro study.

Setting: Laboratory facility in a university teaching hospital.

Direct effects of triiodothyronine on human internal mammary artery and saphenous veins.

Objective: Thyroid hormone (3,5,3'-triiodo-L-thyronine is under investigation as a positive inotrope and vasodilator for patients undergoing cardiac surgery. This study determined the direct effects of triiodothyronine on human blood vessels.

Design: Prospective, controlled, in vitro study.