Left atrial pacing following Mustard's correction of transposition of the great vessels.

large amounts of aluminum-containing particles are introduced into the respiratory tract.18’19 While metallic aluminum and M203 dusts seem to have a fibrogenic potential in the lungs, the risk in most occupational settings is believed to be small. The patient described in this report worked in confined quarters aboard ship, where he was exposed exelusively to aerosols of oxidized aluminum. Concentrations of welding fumes under these conditions are increased approximately tenfold over the amounts detectable in the air around welders working in open spaces.2#{176} The patient also was a heavy smoker. In this regard, experimental studies have demonstrated the retention of inhaled particulates and strikingly reduced lung clearance in smokers.21 One might conclude that this set of circumstances predisposed to aluminum particle accumulation in the lungs and the development of pulmonary lesions.