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.
A bit of history: High Canadian gas prices stayed that way even when the government took over part of the oil industry and founded Petro-Canada in the 1970â²s. The government-run oil company slowly privatized and finally merged with Suncor in 2009, and Suncor now owns 60 percent of the oil company.