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The human heart is always surrounded by a minimal quantity of fluid, but a person with excess fluid around the heart is suffering from pericardial effusion. This condition is not usually harmful, but extreme pericardial effusion can lead to impairment of the function of the heart.


Although there are many reasons for fluid in the lungs, the most common are related to the heart, according to Mayo Clinic. The medical term for this condition when it relates to the heart is cardiogenic pulmonary edema. Coronary artery disease, damage to the heart muscle, heart valve problems and h


According to WebMD, fluid around the heart can indicate pericardial effusion, which is also known as pericarditis. Fluid fills the sac surrounding the heart, the pericardium, and causes symptoms including fever, fatigue and shortness of breath. Viral infections are the leading cause of pericarditis,


Although fluid is sometimes used as an alternative word for liquid, air is treated as a fluid in the field of fluid mechanics. Objects moving through air encounter forces and experience conditions similar to objects traveling through liquids.


According to Reference.com, "fluid pressure" is defined as the pressure exerted by a fluid at a given depth. The weight of the liquid acting on a unit area combined with pressure acting on the surface of the liquid determines the amount of liquid pressure.


Infection, inflammation, injury and cancer are among the potential causes of fluid around the heart, states the Mayo Clinic. Cancer treatment and prescription drugs are possible causes as well.


A fluid challenge is a technique used to evaluate fluid responsiveness among critically ill patients. It is a diagnostic intervention practice that corrects volume depletion without risking fluid overload, according to the United States National Library of Medicine.


Vehicle fluid capacity is the maximum amount of a certain type of fluid recommended for a vehicle. Fluid capacities are listed in the vehicle's owners manual. The manual typically lists capacities for motor oil, transmission fluid, brake fluid and power steering fluid.


Air is a fluid because the force needed to deform it depends on how fast it is deformed, not on how much it is deformed. This differs from a solid, where the force needed to deform it remains the same whether it is done quickly or slowly.


Group communication refers to the interaction between members of a small group of individuals. Quality communication leads to effective group decision making and project completion. Sociologists study group communication in work and social groups.