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.
Fully regulated with decades-long utility infrastructure investment opportunities. NiSource Inc. (NYSE: NI) is one of the nationâs largest fully regulated utility companies, serving approximately 4 million natural gas and electric customers in seven states under the Columbia Gas and NIPSCO brands.