Person with a broken leg and arm icon vector Man with a broken arm and leg in a cast with a crutch icon isolated on a white background. Health care symbol graphic design element Injured people icon ...

Houses destruction from whirlwind. Buildings damage. Cyclone zone. Vector landscape with broken homes Tornado catastrophe. Natural disaster with hurricane. Power twisted storm concept. Houses ...

A mathematical and physical basis for heart-vector projection concepts is presented and its significance for current practices in frontal-plane and spatial electrocardiography is discussed.