Bradycardia can be caused by: 1  Changes in the heart that are the result of aging.  Diseases that damage the heart's electrical system. These include coronary artery disease, heart attack, and infections such as endocarditis and myocarditis.
Portland Weather In May. The highest recorded temperature in May for Portland for the past 70 years was 100 degrees Fahrenheit, most recently measured on May 28, 1983, and the normal high is 67.
The sun comes out most generously in July, with an average of 16 clear days, and humidity is lowest in August, at about 64 percent. Precipitation. Like its northern neighbor Portland, Eugene also has its fair share of rain, with an average of 17 rainy days per month from November through March. Although the amount and frequency of rainfall drops between June and September, you can still expect to see three or four rainy days per month during the summer.