St. Helens Chronicle. August 18 at 7:00pm Â·. I would suggest the City of St. Helens contact Boise, ask for at least one-half the cost of this cleanup of this PP and, if they do not agree, the City of St. Helens should bring suit against Boise for knowingly polluting and contaminating our environment.
Some types of arrhythmias, such as ventricular tachycardia, are serious and even life threatening. In the United States, arrhythmias are the primary cause of sudden cardiac death, accounting for more than 350,000 deaths each year.
Sustained tachyarrhythmias in the atria, such as atrial fibrillation, paroxysmal atrial tachycardia (PAT), and supraventricular tachycardia (SVT), originate because of micro-or macro re-entry. In general, the seriousness of cardiac arrhythmias depends on the presence or absence of structural heart disease.The most common example of a relatively benign arrhythmia is atrial fibrillation (see the chapter â Atrial Fibrillation)â.Similarly common are PACs and PVCs, which, although a nuisance, generally are benign in the absence of structural heart disease.n general, the seriousness of cardiac arrhythmias depends on the presence or absence of structural heart disease. The most common example of a relatively benign arrhythmia is atrial fibrillation (see the chapter â Atrial Fibrillation)â.