Beating Heart

today to see the heart and its function. I will explain how MRI can be used for imaging the heart. Cardiac magnetic resonance imaging (MRI) is a noninvasive test that uses a combination of a large magnet, radiofrequencies and a computer to produce detailed images of a patient's heart as it is beating. An MRI is an effective tool for mapping the overall heart structure of patients and can use these images to search for aneurysms, tears , aorta bulging and damage caused by a heart attack, and…

Premature Ventricular Contraction A premature ventricular contraction is an irregularity in the normal heart rhythm. These contractions are extra heartbeats that occur too early in the normal sequence. In most cases, these contractions are harmless and do not require treatment. CAUSES Premature ventricular contractions may occur without a known cause. In healthy people, the extra contractions may be caused by: • Smoking. • Drinking alcohol. • Caffeine. • Certain medicines. • Some…

doing what I now know as chest compressions. We never found out what happened to the man, but what I know is that I want to learn CPR. Cardiopulmonary resuscitation or CPR is a lifesaving technique, useful in emergency where someone’s breathing or heart beat has stopped (Mayo Clinic). Its main goal is to manually preserve organ functions, especially the brain, of a person who is in cardiac arrest. CPR is important because cardiac…

very captivating to me. As many of you may know, heart attacks are fatal occurrences that typically result in the death of part of a heart muscle. Recent studies at John Hopkins Medical Hospital have shown that a special sticky protein, gel that they created can help stem cells stay in or on rat hearts and restore their metabolism after transplantation. This discovery has given a new way and hope for researchers to heal the human hearts after heart attacks. This research started with the problem…

During one year, the heart initiates approximately 32 million heartbeats to pump blood around the body, beating a total of 60-80 times per minute at a normal pace. It is a highly efficient organ and constantly works to keep our blood circulation going and ourselves alive. The high efficiency of the heart pumping system originates in a conductive system, which is linked to the Sinoatrial (S-A) and Atrioventricular (A-V) node. The Sinoatrial node, also known as the natural cardiac pacemaker, is…

isolated heart from normal rats following acute MI Juea Park INTRODUCTION The heart is a muscular oragn which has to perform work to eject blood for the right and left entricles. Two laws govern the relationship between ventricular volume and cardiac pump performance. The first, the law of Laplace, is a low stating that when the ventricle dilates, the wall stress needed to achieve a give intraventricular pressure is increased. The second, Starling’s law of the heart,…

temperature rises as if my cheeks were slowly absorbing the heat from a hot stove. I support the weight of high expectations on my shoulder from myself and my family. I get onto my starting block and after every second going by I can hear my heart beating in my own ears so deafeningly as if it were pounding on my ribcage to rip free from my chest. I concentrate on gulping as much of oxygen I can accommodate in my mouth like a lion deprived of food and is ferociously stuffing…

Degenerative Disease may also affect the central nervous system, bones, blood vessels or heart. In this case the two diseases I have chosen to discuss are Heart Disease and Osteoporosis. I believe that our body composition is a uncertain issue many…

fourteen year old boy was undergoing surgery when his heart suddenly stopped. Otherwise known as cardiac arrest. Cardiac arrest is when the heart stops all electrical activity, eventually stopping the heart muscle from contracting. When the heart stops beating, the whole body including the brain does not receive oxygen. If the brain lacks oxygen for, ten to fifteen minutes, there could be permanent brain damage. It is crucial that the heart starts beating or someone starts Cardiopulmonary…

injury. The organs that can be donated are; hearts, lungs, kidneys, pancreas, lungs, liver, and intestine which must be used within 4-6 hours after removal depending on the organ. Most donated organs are from those who have previously passed, but living donors can donate as well. Living donors can donate a kidney or part of pancreas, lung, liver, or intestine. Tissues can also be donated, they can donate; corneas, ski, tendons, cartilages, bones, and heart valves which can be stored in tissues…