The emergency department staff began treatment for a woman who presented with chest pain. The pain is described as retrosternal, worse with minimal activity, better with rest, sharp in character and 9/10 in intensity. You are paged to admit her to the intensive care unit under the working diagnosis of unstable angina. Her vitals have remained stable after beginning antiplatelet, antihypertensive and antithrombotic medications. Two hours after admission, a repeat history and physical and review of available test results offers the following information: Serial electrocardiograms reveal increasing R wave amplitude; An echocardiogram calculates an ejection fraction of 50%; Angina is reported as 9/10 in intensity; Atrial natriuretic peptide levels are elevated. Which of the following historical facts would prompt you to immediately consult interventional cardiology for invasive coronary revascularization?

50% ejection fraction

Continued chest pain

Elevated atrial natriuretic peptide

R wave progression

Muscles in the body us with a lot of things for example, if i wanted to lift a heavy box and had no muscle i would just collapse where i was because of the fact muscles hold us together. overall they are 650 muscle in the human body, all of them have different purposes and ways to keep us together. there are three types of muscle in the body skeletal, smooth, and cardiac muscle. skeletal muscle are attached to the bone and with movement. smooth muscle, this is found in the wall of our organs, such as our stomach, this muscle with movement   as well, without this muscle, we would only be allowed to eat small amounts. the cardiac muscle is the heart muscle and probably the most important one. these are only found in the walls of the heart and the heart pump blood to the other parts of your body. we have two different types of muscle fibers, slow twitch and fast twitch. slow twitch muscles enable long-endurance feats such as distance running. fast twitch fatigue faster but are used in powerful bursts of movements like sprinting. there are three different types of muscle contractions concentric, eccentric, isometric. concentric contraction causes muscles to shorten, thereby generating force.   eccentric contractions cause muscles to elongate in response to a greater opposing force. isometric contractions generate force without changing the length of the muscle.: //athleticquickness.com/muscle-contraction-types-part-1/

An advantage of an mri over ct scan is d. it produces better images of hard tissues. hope this : )