Heart disease is a serious concern in the western world, with 1 in 4 people being affected by some form of cardiovascular disease. It goes without saying that the heart is a precious organ and should be treated as such, however sometimes it's difficult to determine how it's doing. Fortunately, there are some outward signs that you can check for at home right now without even standing up that could be indicators of potential heart disease.Grey around the irisA discoloured, halo-like ring around the iris could mean that there are excess fat deposits sitting in the eye. These rings have been shown to have a link to heart disease and stroke.Blue lipsIf lips are showing a blueish colour, this could be a sign of poor blood flow and pressure. Both of these symptoms could be linked to a weakened or compromised cardiovascular system.Nail clubbingClubbing of the fingernails occurs when the body creates excess tissue to compensate for a lack of oxygenated blood flow to the extremities. Much like blue lips, this could be linked to a weakened cardiovascular system.Creased earlobesCreasing of the earlobes is a telltale sign of poor arterial health. Doctors have identified a strong link between creased earlobes and plaque build up in the arteries, which could be an indicator of the disease atherosclerosis. To ensure you keep a healthy heart, make sure to eat right and stay active. Make sure to regularly visit your doctor and be sure to bring up any concerns you may have with the state of your heart. For more information of cardiovascular diseases, take a look at what the NHS has to say.