Apr 29, 2012 · Chris - Well actually, it does cause a bigger heart and it can happen for both good reasons and bad reasons. If you have a very high workload on your heart because you, for instance, have high blood pressure all the time, then you can develop cardiac hypertrophy and this is where the muscle of the heart becomes thickened, …

Jan 27, 2008 · A mouse's heart, for instance, can be pumping at two-four hundred times a minute whereas a big whale could have a heartbeat of say 20 or 10 times a minute but it has got a heart which is the same size as a Volkswagen beetle.

Jun 20, 2017 · Craig - Imagine a four chambered heart, just like a human heart - two atria, two ventricles. Blood returns from the body deoxygenated and it enters the right atrium. It then gets ejected into the right ventricle and, as that ventricle contracts, that ejects that blood to the lungs. Chris - So far that's just like you and me?

Dec 3, 2019 · James - Well, it's really all down to the fact that pig hearts are very similar to the size of human hearts. And let's talk about heart valves for a little bit. There are four heart valves in everybody's heart. And their job is to make sure that the …

Jun 20, 2017 · The heart relaxes much, much more briskly than a normal heart and contracts more avidly than a normal heart during exercise. These people, because their hearts are very, very big they have quite a slow heart rate at rest because the heart doesn’t have to do very much to pump five litres of blood round the body.

Nov 27, 2023 · And this irregular heart rhythm is called atrial fibrillation. And this is a bad thing for patients because it increases the risk of stroke and heart failure and it reduces the quality of life. And there are treatments for atrial fibrillation, including antiarrhythmic drugs and …

Jan 14, 2007 · In the wall of each balloon are tiny capillaries, which are very thin-walled blood vessels. The blood from your heart gets pumped through your lungs, around the walls of these tiny air sacs first, and then back to the heart before it gets jetted off around the rest of the body.

Jun 5, 2019 · Around 1.4 million people alive in the UK today have survived a heart attack, but survivors can suffer from debilitating heart failure, because the heart is damaged during the attack. Ten years ago The Naked Scientists spoke to Professor Sian Harding from Imperial College London about some promising new “heart patches” that could be grown ...

Jun 26, 2011 · A really good example of this is the octopus which not only has a major heart but has managed to evolve two ancillary hearts as well to help its blood flow. So, unlikely to change I think, but perhaps not completely impossible given enough time and the right selection.

Dec 18, 2018 · Chris - But given how common we think that heart disease, heart failure and so on is going to be in the future and given how few transplant organs we have at the moment, that we have access to, it looks like these are definitely going to be a big part of what we do in the future these Ventricular Assist Devices. Stephen - Yeah absolutely.