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.
A cardiac arrest happens when your heart stops pumping blood around your body. If someone has suddenly collapsed, is not breathing normally and is unresponsive, they are in cardiac arrest. There is no time to lose. Even if you are untrained your actions can help. A cardiac arrest is an emergency. If you witness a cardiac arrest, you can increase the personâs chances of survival by phoning 999 immediately and giving CPR. CPR means: Remember-even if you haven't been trained in CPR with rescue breathing, you can still use hands-only CPR.