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.
Photographer: Matthew Staver/BloombergA crew from Alpha Oil & Gas Services, Inc. work on constructing and putting a 10 inch gas pipeline into the ground outside the small boom-town of Watford City, North Dakota, U.S., on Wednesday, October 12, 2011. This pipeline will be owned by Bear Paw Energy and ONEOK.