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.
About an hour before a sudden cardiac arrest, you might feel nauseous, vomit, or have chest pain or shortness of breath. Immediate warning signs of sudden cardiac arrest include heart palpitations or a racing heartbeat, dizziness or lightheadedness, or just feeling more winded or fatigued than usual, Dr. Doshi says. But two-thirds of the time, sudden cardiac arrest has no symptoms. You simply lose consciousnessâand your pulse. Thatâs why itâs extra important that you know what to do if you see someone suddenly go down. Hereâs your course of action: First, call 911 immediately.