Cardiac fibers contract through the process of excitation-contraction coupling which involve the conversion of an electrical stimulus to a mechanical response. In essence, contraction and relaxation help to regulate the flow of blood in the arteries, as well as the flow of the air through the lungs. Contraction involves a precise interaction of contractile proteins, calcium ions, and energy phosphates. Besides, the cardiac fibers relax to return the heart muscles after contraction to the initial conditions. Throughout life, cardiac cycle is significant as it enables the heart to contract 70 times per minute hence supplying five liters of blood to the body.

Introduction

Sound waves that cannot be detected by the ear and are around 20,000 Hz in frequency are called ultrasound. These frequencies range from a minimum of 2MHz and a maximum of 18 MHz when used in Ultrasonography. (Robertson, 2001) The procedure of ultrasound is usually carried out from the external part of the patient’s body (American college of Radiology, 2011).

Assisted suicide: Introduction

It is widely thought that life is a free gift to humankind. The next question that often crops up is whether it is also free to end at will? The act of premeditating death or ending one’s own life on request and enlisting for either professional or non professional assistance for the exercise is what has always been referred to as assisted suicide (AS) or euthanasia. This is the controversial issue being debated among many states that are struggling to come up with laws and legislations to govern the act. Assisted suicide or euthanasia has elicited strong reactions among its supporters and opposers on a wide scale. Assisted suicide has prompted a lot of debates across the global society (Kluge, 39-43). This paper seeks to discuss the case of assisted suicide in Florida Vs Oregon.

Introduction

The World Health Organization (WHO) has attributed 35 million deaths totalling to about 60% every year to non communicable diseases such as cardiovascular diseases, chronic respiratory diseases, cancer and diabetes. Diabetes is one of those dubbed as the world's leading killer diseases today, having caused about 1.3 million deaths with global prevalence of 10% among adults aged 25 years and above in 2008 (World Health Organization, 2008). "Diabetes is a chronic, debilitating and costly disease associated with severe complications, which poses severe risks for families, Member States and the entire world and serious challenges to the achievement of internationally agreed development goals, including the Millennium Development Goals."(UN Resolution 61/225).