The third heart sound (S3), also known as the "ventricular gallop," occurs just after S2 when the mitral valve opens allowing passive filling of the left ventricle. The S3 sound is actually produced ...

After selling millions of Galaxy S3 handsets, Samsung has the tech world’s attention. With countless eyeballs fixed on the reveal of the Galaxy S4, the company presented – apart from some cheesy ...

The fourth heart sound (S4), also known as the "atrial gallop", occurs just before S1 when the atria contract to force blood into the LV. If the LV is non-compliant and atrial contraction forces blood ...

Samsung's lifted the lid on its new flagship mobile -- so how exactly is it different from the good ol' Galaxy S3? Luke Westaway is a senior editor at CNET and writer/ presenter of Adventures in Tech, ...