Heart failure is one of the most dangerous and commonly found diseases in the world affecting more than 26 million people. Heart failure could be alarming because it not only affects the Heart but also most of the other organs too due to the insufficient supply of Oxygen and other vital nutrients. There are several factors such as obesity, high blood pressure, high cholesterol, stress, hereditary causing Heart attack. On the other side, there are several methods of treatment available through both Transplantation and Implantation. However, there is at least a small amount of discomfort or unreliability prevailing with most techniques [4 &5].
An Introduction to Biomaterials
Buddy D. Ratner
University of Washington Engineered Biomaterials
Biomaterials are materials (synthetic and natural; solid and sometimes liquid) that are used in medical devices or in contact with biological systems. Biomaterials as a field has seen steady growth over its approximately half century of existence and uses ideas from medicine, biology, chemistry, materials science and engineering. There is also a powerful human side to biomaterials that considers ethics, law and the health care delivery system. This brief introduction overviews some key characteristics of the field of biomaterials and outlines issues and major subdivisons.
Researchers pace embryonic heart with laser
Love, exercise and, new research shows, an infrared laser can make a heart beat faster.
Scientists at Case Western Reserve University and Vanderbilt University found that pulsed light can pace contractions in an avian embryonic heart, with no apparent damage to the tissue. The work, “Optical pacing of the embryonic heart,” will be published in the advanced online issue of Nature Photonics on Aug. 15, 2010.
According to the scientists, this non-invasive device may prove an effective tool in understanding how environmental factors that alter an embryo’s heart rate lead to congenital defects. It may also lead to investigations of cardiac electrophysiology at the cellular, tissue and organ levels, and possibly the development of a new generation of pacemakers.
- What is an arrhythmia?
- How common are arrhythmias?
- What are the clinical symptoms?
- What causes arrhythmias?
- What are the consequences of arrhythmias?
- How are arrhythmias treated?
- What are heart valves and what is their function?
- What causes valve defects?
- What are the consequences and clinical symptoms of valve disease?
This is a normal rhythm, and is not of diagnostic significance unless the rate, which ranges from 60 to 100 beats per minute, is not appropriate for the clinical setting.
This rhythm differs from normal sinus rhythm only in that the rate is above 100 beats per minute. The differential diagnosis is extensive. Common causes are anxiety; physiological stress such as hemorrhage, dehydration, sepsis, and fever; and hyperthyroidism. Correction of the underlying cause, if necessary, is recommended.