Les torsades des pointes.

A 17-year-old woman had two admissions within five months for recurrent episodes of ventricular tachycardia in conjunction with a prolonged QT interval. On both occasions these were refractory to intravenous lidocaine and bretylium. During her first admission her dysrhythmia was controlled by repeated doses of intravenous propranolol; however, she required temporary overdrive transvenous pacing on her second admission.

Ocean research under foreign jurisdiction.

In more than one-fourth of recent cases, U.S. marine scientists desiring to work off the shores of other countries were denied access or encountered inordinate delays in approval of their requests.

Structural rearrangements of chromosomes in the domestic chicken: experimental production by X-irradiation of spermatozoa.

In order to produce chicks heterozygous for structural aberrations of chromosomes, 67 hens were inseminated with semen that had been exposed to 1200 R of X-rays. A sample of 204 chicks was hatched and survived. Among these, 18 (8.