In some cultures in the Northern Hemisphere, the astronomical March equinox (varying between 19 and 21 March) is taken to mark the first day of spring, and the Northern solstice (around 21 June) is taken as the first day of summer. In other traditions, the equinox is taken as mid-spring.
Circulation problems that cause dizziness. You may feel dizzy, faint or off balance if your heart isn't pumping enough blood to your brain. Causes include: 1  Drop in blood pressure.
Arrhythmias happen when the heartâs electrical signal causes it to pump too fast or irregularly. Arrhythmias can prevent the heart from pumping enough blood to your brain and body and cause other problems, such as blood clots. Cardioversion uses medications or low-energy electrical shocks to restore a normal heartbeat. Cardioversion is usually a scheduled procedure. It is an emergency procedure done right away when symptoms are severe. Severe symptoms include dizziness, passing out, chest pain, shortness of breath, and low blood pressure. Cardioversion is only one method of treating cardiac arrhythmias.