----------------------- The Atrioventricular Node (AVN) • This is the node that involves both the atria and ventricles. • The AVN is deep in the centre of the heart muscle. • It picks up the wave sent by the SAN and delays it by about 0.1s to let the atria finish contracting before the AVN sends the second wave. • The AVN uses the Purkyne tissue (a conducting tissue) to the apex. • The wave is sent up through the ventricles making them contract‚ pushing the blood through the semilunar valves
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Medications for cardiac arrest * Epinephrine 1mg iv bolus every 3-5 mins * Vasopressin- alternative to epinephrine * Treatment for vf‚ vt‚ pea‚ asystole * Dose: 40 units iv single * Norepinephrine – for severe hypotension * For low total peripheral resistant * Dose 0.1-0.5 mcg/kg/min infusion * Not use for cardiac arrest * Dopamine – Dose: 2-20 mcg/kg/min infusion‚ titrate to patient response * Do not administer in same iv line as Na bicarb * Dobutamine
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Cardiac Pacemakers The heart is bestowed with a specialized system that automatically generates rhythmic control via the sinus node‚ located in the superior lateral wall of the right atrium near the opening of the superior vena cava. The specialized pacemaker cells dictate control of the rest of the heart through regular electrical impulses that propagate from the right atria to the lower ventricles. The rapid conduction of these impulses cause the muscle cells of the atria to contract
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Muscles are all made of the same materials‚ a type of flexile tissue of thousands narrow tissues that make up all the muscles. There are three types of muscle tissue in the human body which are Cardiac‚ Smooth and Skeletal Muscles. Cardiac Muscles are muscles that conduct‚ forced‚ being completely in heart‚ responsible for pumping activity of heart‚ very heavy and solid. Smooth are non band‚ not under voluntary force found in comfortable organs of body accountable for growth like absorption of food
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disease is the number one killer in the United States of America. Sudden cardiac death‚ or SCD‚ is the largest cause of natural death in the United Sates. SCD causes about three hundred twenty-five thousand adult deaths each year in the US. Half of all heart disease deaths are caused by sudden cardiac arrest. Occurring mainly in adults in their mid-thirties to mid-forties‚ SCD affects only one or two children each year. Sudden cardiac arrest is not a heart attack‚ or myocardial infarction‚ but it is possible
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Cardiac This is an involuntary muscle‚ found solely in the walls of the heart‚ as well as in the walls of the blood vessels. This sort of muscle has similarities with the skeletal muscles‚ because it is striated. Furthermore‚ it has slight similarities to the smooth muscles‚ because its contractions are not under conscious control. On the other hand this type of muscle is highly specialised. It is under the control of the autonomic nervous system‚ however‚ even without nervous imput contractions
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Assessment 2 – Congestive Cardiac Failure 1. Mr Wright’s admission states that he has CCF (congestive cardiac failure). Clearly define CCF. What organs and which body systems are affected by this disorder? Congestive cardiac failure defined Congestive cardiac failure (CCF) is a progressive disease of the heart‚ which involves loss of pumping ability by the heart. Congestive cardiac failure occurs when the myocardium loses its ability to pump enough blood to meet the body’s metabolic needs and is
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Period of Cardiac Muscle Lab Report Pre-lab Quiz Results You scored 100% by answering 4 out of 4 questions correctly. 1. The cardiac muscle is capable of which of the following? You correctly answered: c. autorhythmicity 2. Phase 2 of the cardiac action potential‚ when the calcium channels remain open and potassium channels are closed‚ is called the You correctly answered: a. plateau phase. 3. Which of the following is true of the cardiac action potential? You correctly answered: b. The cardiac action
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Harvard Business School 9-698-004 We’ve Got Rhythm! Medtronic Corporation’s Cardiac Pacemaker Business The legacy af Medtramc Corporation‚ the company that created the cardiac pacemaker industry‚ is a proud one. Starting fram its earliest pacemakers‚ which had to be carried outside the body‚ Medtramc had achieved dramatic improve ments ln the functionality‚ size and reliabilit)’ Df these d evi ces. ln 50 doing it had extended the lives‚ and improved the quality Df lHe‚ for hundreds Df thousands
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CONGESTIVE CARDIAC FAILURE Congestive cardiac failure is defined as “the state in which the heart is unable to pump blood at a rate adequate for supplying the requirements of the tissues with function parameters remaining within normal limits usually accompanied by effort intolerance‚ fluid retention and reduced longevity” (Denolin‚ 1983‚ p. 445). Congestive cardiac failure or heart failure continues to be a major public health issue worldwide. This paper is a case study report about C.B‚ a 60
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