August is the hottest month in Cannes with an average temperature of  22Â°C (72Â°F) and the coldest is January at 8Â°C (46Â°F) with the most daily sunshine hours at 11 in August. The wettest month is October with an average of 70mm of rain.
Normal heartbeat. Tachycardia is caused by something that disrupts the normal electrical impulses that control the rate of your heart's pumping action. Many things can cause or contribute to problems with the heart's electrical system.These factors include: 1  Damage to heart tissues from heart disease. Ventricular tachycardia. 2  Ventricular tachycardia is a rapid heart rate that originates with abnormal electrical signals in the ventricles. 3  The rapid heart rate doesn't allow the ventricles to fill and contract efficiently to pump enough blood to the body.
If the heart can continue to pump normally, though, some ventricular tachycardias may be tolerated without fainting (syncope) or cardiac arrest. Tachycardia may be nonsustained (lasting only seconds) or sustained (lasting for minutes or hours). Tachycardias also can cause serious injury to other organs. For example, the brain, kidneys, lungs or liver may be damaged during prolonged cardiac arrest. Blood clots can form in the heart's upper chambers because of atrial fibrillation, a disorder in which the atria quiver instead of beating effectively.