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.
When legendary investor Warren Buffett, actively pursuing electric utility plays, bought Nevadaâs sole investor-owned utility, NV Energy, at the end of 2013 for $5.6 billion, many industry mavens saw it as a green power move.