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Virtual Sheep Heart Dissection Lab Student Worksheet
Virtual Sheep Heart Dissection Lab Student Worksheet

... 4. The line running diagonally down from the right side (facing you) of the heart to the bottom left side is the coronary artery. The coronary artery supplies blood to the heart muscle tissue. The pointed bottom of the heart is called the apex. What do you think is the purpose of the coronary artery ...
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The clinical challenge of concomitant aortic and mitral valve stenosis
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... concomitant MS. Rapid relief of the mitral obstacle following balloon dilatation or surgery will abruptly increase preload which may eventually lead to acute left ventricular failure and “flash” pulmonary oedema. Left ventricular abnormal relaxation resulting from AS can increase mitral E wave half- ...
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... essential during diastole. Therefore in aortic regurgitation blood backflow in the ventricles causing diastolic murmurs (after the 2nd heart sound). ...
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... Can blood go backwards from the right ventricle to the right atrium? ___________________ 2. Find the superior vena cava on the back side of the heart. 3. Peek into the right atrium and notice the tricuspid valve (from the other side). Stick your finger into the superior vena cava and through the tri ...
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... • Clinical features – Concentric left ventricular (pressure  overload) hypertrophy – The hypertrophied myocardium tends to be  ischemic  – Angina pectoris  – Cardiac decompensation and heart failure – Systolic ejection murmur ...
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... between a wide range of abnormal heart sounds -- split sounds, ejection sounds, gallop rhythms, and clicks, for example. He or she also must differentiate between abnormal lung and heart sounds, and listen to see if timing of abnormal sound is correlated with respiration or heartbeat. The location a ...
Influence of prosthetic mitral valve orientation on left ventricular flow
Influence of prosthetic mitral valve orientation on left ventricular flow

... The valves of the heart direct the blood pumped by the cardiac muscle from venous to arterial side. Due to pathological changes, the function of a valve may be compromised to the extent that it needs to be replaced. In many cases a mechanical prosthesis will be chosen due to its high Figure 1: Prosd ...
Cardiac Surgery: Aortic Aneurysms
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... An aneurysm occurs when the wall of the aorta weakens. The pressure of the blood flowing through the vessel creates a bulge at the weak spot. This is similar to the way an overinflated inner tube can cause a bulge in a tire. The bulge usually starts small. Over time, as the pressure continues, it ca ...
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...  Transmitted throughout the superior thoracic aorta and even into the large arteries of the neck ...
Congenital Diseases
Congenital Diseases

... Hypoplastic left ventricle1-3 Hypoplastic right ventricle1-3 Truncus arteriosus1-2 Total anomalous pulmonary venous return1-2 ...
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Aortic stenosis



Aortic stenosis (AS) is the narrowing of the exit of the left ventricle of the heart such that problems result. It may occur at the aortic valve as well as above and below this level. It typically gets worse over time. Symptoms often come on gradually with a decreased ability to exercise often occurring first. If heart failure, loss of consciousness, or heart related chest pain occurs due to AS the outcomes are worse. Loss of consciousness typically occurs with standing or exercise. Signs of heart failure include shortness of breath especially with lying down, at night, and with exercise as well as swelling of the legs. Thickening of the valve without narrowing is known as aortic sclerosis.Causes include being born with a bicuspid aortic valve and rheumatic fever. A bicuspid aortic valve affects about one to two percent of the population while rheumatic heart disease mostly occurring in the developing world. A normal valve, however, may also harden over the decades. Risk factors are similar to those of coronary artery disease and include smoking, high blood pressure, high cholesterol, diabetes, and being male. The aortic valve usually has three leaflets and is located between the left ventricle of the heart and the aorta. AS typically results in a heart murmur. Its severity can be divided into mild, moderate, severe, and very severe based on ultrasound of the heart findings.Aortic stenosis is typically followed using repeated ultrasounds. Once it has become severe treatment primarily involves valve replacement surgery with transcatheter aortic valve replacement (TAVR) being an option in some who are at high risk from surgery. Valves may either be mechanical or bioprosthetic with each having risks and benefits. Another less invasive procedure, balloon aortic valvuloplasty (BAV) may result in benefit but this is for only for a few months. Complications like heart failure may be treated as per normal in those with mild to moderate AS. In those with severe disease a number of medications should be avoided including ACE inhibitors, nitroglycerin, and some beta blockers. Nitroprusside or phenylephrine may be used in those with decompensated heart failure depending on the blood pressure.Aortic stenosis is the most common valvular heart disease in the developed world. It affects about 2% of people who are over 65 years of age. Estimated rates are not known in most of the developing world as of 2014. In those who have symptoms, without repair, the chance of death at five years is about 50% and at 10 years is about 90%. Aortic stenosis was first described by French physician Lazare Rivière in 1663.
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