it would not be possible for us to live. The heart is about the size of a fist and is broken down into four chambers‚ the aorta‚ superior vena cava‚ pulmonary artery‚ and the coronary artery. The four chambers include the right and left atrium and the right and left ventricle. The heart is responsible for supplying oxygen and blood to the entire body. Blood passes through these four chambers and then exits and pumps into the rest of the body. The heart also has three layers of walls
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approach at analyzing sales data. Ron Hagler‚ had just received a report on the past five years of quarterly sales data for the regions that he is in charge of. After Ron looks at the sales data‚ he immediately calls a meeting with his regional managers to discuss what he saw. He is correct when he notifies his managers that sales rose and fell during certain quarters and years BUT he failed to understand why these variations occurred. Issues ❖ Ron Hagler has ineffective approach at improving
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arrhythmias further divided into Disorders of impulse conduction and disorders of impulse generation. The various and detailed events that take place with every heart beat is referred to as the "cardiac cycle". The top chambers of the heart are called the atria and the bottom chambers‚ the ventricles. A normal heart beat begins when the Sino-Atrial Node‚ located on the posterior wall of the right atrium. The Sino-Atrial Node initiates the "wave of contraction" which results in the contraction of the
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heart and also forms the valve flaps is the __(12)__. This layer is continuous with the __ (13)__ linings of the blood vessels that enter and leave the heart. The heart has __ (14)__ chambers. Relative to the roles of these chambers‚ the __(15)__ are the receiving chambers‚ whereas the __(16)__ are the discharging chambers. 17. Draw and label the parts of the heart internally and exteriorly. 18. A number of characteristics peculiar to skeletal or cardiac muscle are listed below. Select which ones refer
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electrode portion of a pacemaker? ANSWER: __either an epicardial or transvenous approach can be used to implant the electrode portion of the pacemaker‚ the epicardial approach involves opening the chest to the view of the surgeon and the device being place on the heart________________ 6. Q) What does insufficiency of a heart valve mean? ANSWER: __the valve does not close property‚ which may lead to hypertrophy (enlargement) of the heart because blood will pool in the chambers.________________
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layers the Endocardium‚ myocardium‚ and epicardium. The epicardium is the outermost layer of the heart. The myocardium is the idle layer of and actual contracting muscle of the heart. The endocardium is the innermost layer and lines the inner chambers and heart valves. Pericardial sac: The pericardial sac encases and protects the heart from trauma and infection. The pericardial sac has two layers which are the parietal pericardium which is the tough‚ fibrous outer membrane that attaches
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Tachycardia (SVT) Normally‚ the chambers of the heart (atria and ventricles) contract in a coordinated manner. The contractions are caused by an electrical signal that begins in an area of the heart called the Sino atrial node (also called the sinus node). The signal moves through the upper heart chambers and tells the atria to contract. The sinus node is a natural pacemaker that controls the rhythm of the heart. Electrical impulses travel from the natural pacemaker through the atria then pass through
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the sinus node are called Normal Sinus Rhythm (NSR)‚ Sinus Bradycardia‚ Sinus Tachycardia‚ and Sinus Arrhythmia. Normal Sinus Rhythm is fairly easy to understand due to the pacemaker impulse‚ which originates in the sinus node and travels through the normal conduction pathways within normal time frames. Because the pacemaker originates in the sinus node and the conduction is normal‚ the P waves are uniform and will have a P wave for each QRS complex. Due to it being a Normal Sinus Rhythm the heart
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will have a higher risk for this if they smoke frequently‚ or drink caffeine often. Symptoms may include‚ tiredness‚ chest pains‚ dizziness‚ short breaths‚ and fainting. Long term treatments are a defibrillator‚ cardiac ablation‚ medication‚ and a pacemaker. Implantable Cardioverter Defibrillator (ICD) An Implantable Cardioverter Defibrillator is a common implant given to people with PSVT. It is known to shock the heart back to its regular rhythm. The procedure starts off with wires getting implanted
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and orientation of the heart in the thorax. 2. Name the coverings of the heart. 3. Describe the structure and function of each of the three layers of the heart wall. 4. Describe the structure and functions of the four heart chambers. Name each chamber and provide the name and general route of its associated great vessel(s). 5. Trace the pathway of blood through the heart. 6. Name the major branches and describe the distribution of the coronary arteries. 7. Name the heart
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