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.
Going to Salem? Find the best month to visit Salem based on the weather. Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec. Expect 16Â°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Salem in April. Check more long-term weather averages for Salem in April before you book your next holiday to Oregon in 2018.