The indication for pacemaker implantation was sinus-node dysfunction in all cases, but 21 percent of patients also had atrioventricular block. A total of 1014 patients were assigned to dual-chamber pacing, and 996 patients were assigned to ventricular pacing.
blitzkrieg [(blits-kreeg)] A form of warfare used by German forces in World War II. In a blitzkrieg, troops in vehicles, such as tanks, made quick surprise strikes with support from airplanes. These tactics resulted in the swift German conquest of France in 1940 (see fall of France). Blitzkrieg is German for âlightning war.â.
On September 1, 1939 German troops swarmed across the Polish border and unleashed the first Blitzkrieg the world had seen. Hitler had been planning his attack since March-ever since German troops occupied the remainder of Czechoslovakia. The Poles suspected as much and readied their defenses.