Ventricular pacemaker cells discharge at a slower rate than the SA or AV node. While the SA node typically initiates a rate of 70 beats per minute (BPM), the atrioventricular node (AV node) is usually only capable of generating a rhythm at 40-60 BPM or less. Ventricular contraction rate is thus reduced by 15-40 beats per minute.
Littleton, CO Population and Races. As of 2010-2014, the total population of Littleton is 43,710, which is 8.35% more than it was in 2000. The population growth rate is much lower than the state average rate of 20.84% and is lower than the national average rate of 11.61%.
Williston, North Dakota. Williston is a city in and the county seat of Williams County, North Dakota, United States. The 2010 census gave its population as 14,716, and the Census Bureau gave the 2015 estimated population as 26,977, making Williston the sixth largest city in North Dakota. The North Dakota oil boom is largely responsible for the sharp increase in population.