Atrial tachycardia is a supraventricular tachycardia (SVT) that does not require the atrioventricular (AV) junction, accessory pathways, or ventricular tissue for its initiation and maintenance.
Page Content. Northern Natural Gas Company (Northern) is a subsidiary of Berkshire Hathaway Energy based in Omaha, Nebraska and has been in business since 1930. Northern owns and operates the largest interstate natural gas pipeline system in the United States.
Fourth-largest producer Devon Energy has more than 70 percent of its reserves in natural gas drilled in Barnett Shale in Texas. More than 14,000 companies vie for drilling rights to the United Statesâ approximately 2,203 trillion cubic feet of natural gas.