observed. Nicotine slows the heart rate down. The most likely is caused by nicotine binding to nicotinic receptors. This activates the parasympathetic neuron that causes a slowing of the heart rate. It ECG is most comparable to that of calcium and digitalis due to the effect of slowing heart rate. Another way of studying the heart is through careful auscultating. In this particular lab‚ the heart sounds were listened to. No difference was noted during the different breathing patterns. This could very
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and relative refractory periods will be studied in direct stimulations of the heart‚ as well as the five phases of the cardiac cycle. Lastly‚ the effects of temperature‚ hormones‚ and ions will be understood. Epinephrine‚ pilocarpine‚ atropine and digitalis are the hormones used to modify the heart. Sodium‚ potassium and calcium are the ions used in this experiment. Methods In the Vessel Resistance section for the Cardiovascular Dynamics experiment‚ two glass beakers‚ a tube connecting them
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Electrical Stimulation Activity 1: Direct Heart Stimulation 1. Did you see any change in the trace? No change in the trace 2. Why or why not? This is because it needs more simulation 3. Did you see any change in the trace? I did see a change in the trace 4. Why or why not? There is double stimulation 5. Describe the change you see in the trace. How does it differ from the baseline trace? The trace increased from the baseline trace 6. What effect do the repeated stimuli
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Application: - Herpes zoster (skin): Crush leaves‚ mix with oil and apply on lesions. Do not apply on raw surface. Milky juice of the plant is irritating. Caution: Not to be taken internally. - Herpes simplex: Mix 1 cup of chopped leaves and bark with 2 tablespoons of oil. Apply to lesions 3 times daily. - Ringworm: Chop a foot long branch and mix with 1 cup chopped fresh young leaves. Mix the juice with 5 drops of fresh coconut oil. Apply 3 times daily. - Snake bites: Pound 10 leaves and a piece
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consequences of gastric exasperation that may arise if taken without food. Both Furosemide and digoxin can grounds hypokalemia which can be regulated by encouraging Mrs. A to eat potassium-rich foods‚ educating her on dosage regimen‚ report signs of digitalis toxicity‚ and follow the treatment
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bloating Anxiety‚ fear‚ depression Ascites THINK: Systolic: heart can’t contract and eject Diastolic: ventricles can’t relax and fill Plan/ Implementation 1. Administer cardiac glycosides a. Digitalis (e.g.‚ digoxin)— fundamental drug in the treatment of heart failure‚ especially when associated with low cardiac output b. Two categories of dosages 1)
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extrasystole‚ and to explain at what point in the cardiac cycle (and on an ECG tracing) an extrasystole can be induced. 5. To describe the effect of the following on heart rate: vagal stimulation‚ cold‚ heat‚ pilocarpine‚ atropine‚ epinephrine‚ digitalis‚ and potassium‚ sodium‚ and calcium ions. 6. To define vagal escape and discuss its value. 7. To define ectopic pacemaker. I nvestigation of human cardiovascular physiology is very interesting‚ but many areas obviously do not lend themselves
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assistance with activities of daily living. Even minimal activity was associated with moderately severe dyspnea and exertional chest pain‚ which was relieved by rest. A.O. also exhibited marked pedal edema bilaterally. She is being treated with digitalis‚ furosemide (Lasix)‚ KCl‚ and sublingual nitroglycerin. Discussion Questions 1. Which type of heart failure (left or right sided) is usually associated with dyspnea? What other clinical findings are likely to be present with left-sided heart failure
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EXERCISE 6: CARDIOVASCULAR PHYSIOLOGY |ACTIVITY 1: Investigating the Refractory Period of |Answers | |Cardiac Muscle | | |Which of the following types of muscle tissue can depolarize spontaneously in the |C- Cardiac Muscle
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agonist cimetidine. Beta blockers were originally developed to treat angina pectoris but were discovered to also treat hypertension‚ tachycardia‚ an myocardial infarctions. The discovery of propanolol was said to be the greatest discovery since digitalis. The mechanism of beta blockers treating CHF is not exact but may include a “reduction in circulating levels of vasoconstrictors‚ reductions in blood pressure‚ heart rate and myocardial oxygen consumption‚ up regulation of myocardial B-1- receptor
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