Premature ventricular contractions are common. Many people have premature ventricular contractions without any symptoms. Premature ventricular contractions may be more common among older patients, patients with high blood pressure, and patients with heart disease. Premature ventricular contractions can also occur in young healthy individuals without heart disease or high blood pressure.
Full Answer. The midnight sun is a natural phenomenon. It reaches its peak during the summer solstice, which occurs around June 21 each year. On the day of the solstice, areas in Norway and in other regions around the world north of the Arctic Circle may receive almost 24 hours of sunlight. The sun in these areas continues to shine through the midnight hour, which is how the term midnight sun arose.
Polar Night is when none of the Sun's disc is visible above the horizon at all during 24 hours of the day.Northern lights during a Polar Night. Northern lights (aurora borealis), stars and the moon light up the otherwise dark Polar Nights in Northern Norway.Â©bigstockphoto.com/sdimitrov. The opposite of Polar Night is Midnight Sun or Polar Day. As the upper edge of the solar disc becomes visible above the horizon, it is sunrise and no longer Polar Night.Sunset is the moment the upper edge of the Sun disappears below the horizon.olar Night is when none of the Sun's disc is visible above the horizon at all during 24 hours of the day. Northern lights during a Polar Night.