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.
Atrial fibrillation, the most common type of serious arrhythmia (irregular heartbeat), is characterized by very fast, irregular electrical signals in the upper chambers of the heart called the atria. These electrical signals may travel through the atria at a rate of more than 300 per minute.