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.
Causes of tachycardia. Tachycardia is generally caused by a disruption in the normal electrical impulses that control our heart's pumping action rhythm-the rate at which our heart pumps. The following situations, conditions and illnesses are possible causes: 1  A reaction to certain medications.bnormal electrical signals in the ventricles result in a rapid heart rate. The speed of the heart beat does not allow the ventricles to fill and contract properly, resulting in poor blood supply to the body. This type of tachycardia is frequently a life threatening condition and is treated as a medical emergency.