Human heart

Atherosclerosis in the Heart The heart is one of the most unique muscles in the human body that contains many vessels and arteries. These vessels and arteries can sometimes become blocked due to an occlusion or pre-existing heart disease. The occlusion or pre-existing condition can be affected if there is a lack or decrease of oxygen being supplied to the heart muscle. Hypoxic cell injury is a mechanism where oxygen levels are decreased to the myocardial cells of the heart and results in…

few make it in vivo trials. Governing bodies like FDA requires in vitro testing prior to the in vivo testing in humans or animals. The in vitro environments gives freedom to experiment and evaluate better designs and conduct certain experiments that could not be controlled as accurately within the body. 1.4.1 Mock Circulatory loops (MCL) In order to install a Medical Device inside a human body, it has to go through various testing methods to validate its purpose and design and to avoid further…

Echocardiogram is a diagnostic study that uses ultrasound waves transmitted through a transducer using a conducting gel to create an image of the heart. Ultrasound waves are cyclic in nature and at a frequency that are not audible within the parameter of human hearing (Fridman, V., 2013). The transthoracic approach provides visualization of the heart and its structures. Throughout TTE the ultrasound probe is positioned at various points on the chest wall and images are taken at each position.…

Every part of the body is essential to its function. The heart is one of the most essential organs in the body; it essentially gives us life. Without the heart, the blood in our bodies would not be able to run its course through our veins and arteries. Without the heart, fresh oxygenated blood could not be produced for the many components of the body that depend on it. Without the heart, a body could not be kept alive. The heart is an organ that pumps blood through the body, supplies oxygen and…

Tim O’Brien’s novel The Things They Carried, comprises twenty-two individual fictional war stories. Although a war novel, the stories don’t focus on guns, grenades, blood, or gore. It focuses on the “human heart.” O’Brien’s novel teaches us that the “human heart” is fragile and the negative impacts of war can break it. Innocence and life are effected in return. Young men enter the war clenching onto they innocence. Unknowingly, they will be stripped from it. Mary Anne Bell—a significant…

Prosthetic Heart Valves for Pediatric Patients Madeline Setear, Biomedical Engineering, University of Rhode Island BME 181 First Presentation, March 6th, 2017 Abstract— Heart valve failure makes up a significant portion of Cardiovascular diseases. Heart valves fail when they are damaged and deteriorating or when they have congenital deformities. Heart valve replacement methods have improved greatly in the past decade. Currently, Mechanical and Biological Heart valve prosthesis exist but both…

made, and who created it, and first developed it. Along with how it has helped people today in modern times. Understanding how willem einthoven had a compelling achievement in understanding the heart rhythms and how to analyze them. In this essay I will help you understand what is essential to vital human life today, and how it came to be understanding the electrocardiogram. Willem Einthoven was born in 1860, on May 21st, born in indonesia, his father died when willem was only six years old,…

Next to the brain, the heart is the most vital organ in the human body. The brain makes the heart function, but without a heart nothing else functions. In fact, in the absence of brain function, a human body can be kept alive for a surprising length of time as long as the heart can be made to beat. The heart pumps blood through 60,000 miles of blood vessels for a daily volume of 2,000 gallons of blood. That's enough to fill a 10 x 20-foot pool 10 feet deep, and the heart does this by beating…

to test the effect of different concentrations of caffeine on the heart. We used ECG stimulator on LabScribe 2 software to monitor the heart rate. We used frogs as a test subject, since both frogs and humans have a closed cardiovascular system, therefore the effect on the frog’s heart would parallel the situation of a human heart. We quantitatively measured the heart rate and found out that caffeine significantly increases the heart rate of the Rana sphenocephala Introduction: Although unclear…

feed off of. Their hunger for human flesh was greater than my actual hunger for food. The happiness on their faces at the sight of human blood spilling was pure disgust. However my heart dropped when one of them caught a young Jewish man about my age by the collar as he tried to run away. They yelled at him but he simply did not understand, so they shot him, thinking he was some uneducated fool just because he did not speak their language. Though what made my heart pound like a drum was the fact…