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.
South Coast. Gold Beach, Brookings and other southern Oregon coastal towns enjoy slightly warmer temperatures year round. Average winter high temperatures range from 55 to 58 degrees, with lows around 41 to 45 degrees. Precipitation is about 11 to 13 inches monthly in winter, drying out to just a half inch during July.s expected, winters are wet along the northern Oregon coast towns such as Astoria, Seaside and Tillamook. Tillamook has the highest monthly precipitation average in the region, which peaks in December at just under 14 inches.