Chapter 1 A Perspective on Human Genetics
... (only point of electrical contact between chambers) • Action potential briefly delayed at AV node (ensures atrial contraction precedes ventricular contraction to allow complete ventricular filling) • Impulse travels rapidly down interventricular septum by means of bundle of His • Impulse rapidly dis ...
... (only point of electrical contact between chambers) • Action potential briefly delayed at AV node (ensures atrial contraction precedes ventricular contraction to allow complete ventricular filling) • Impulse travels rapidly down interventricular septum by means of bundle of His • Impulse rapidly dis ...
Abstract (versão inglesa): The incidence of cardiac failure and renal
... The incidence of cardiac failure and renal failure, either acute or chronic, has increased in recent decades and it has become now clear that the co-existence of these two diseases in one individual has a bad prognosis. The increasing frequency of the number of cases lead clinicians to further explo ...
... The incidence of cardiac failure and renal failure, either acute or chronic, has increased in recent decades and it has become now clear that the co-existence of these two diseases in one individual has a bad prognosis. The increasing frequency of the number of cases lead clinicians to further explo ...
3-cardiac-cycle-1 - INAYA Medical College
... ◦ Action potentials travel down the Atrioventricular bundle (Bundle of His) which splits into left and right atrioventricular bundles (bundle branches) and then into the conduction myofibers (Purkinje cells) Purkinje cells are larger in diameter & conduct impulse very rapidly Causes the cells at ...
... ◦ Action potentials travel down the Atrioventricular bundle (Bundle of His) which splits into left and right atrioventricular bundles (bundle branches) and then into the conduction myofibers (Purkinje cells) Purkinje cells are larger in diameter & conduct impulse very rapidly Causes the cells at ...
Paediatrics Revision Sessions Session 1
... • ECG – biventricular hypertrophy (by 2 months old) • Echo – shows size, haemodynamic effects & pulmonary hypertension ...
... • ECG – biventricular hypertrophy (by 2 months old) • Echo – shows size, haemodynamic effects & pulmonary hypertension ...
ATRIAL FIBRILLATION CARDIOVERSION FOLLOWING
... experimental reports have indicated that an imbalance of autonomic control mechanisms due to either an increase in vagal or sympathetic neural activity directed to the heart may favor the initiation and maintenance of AF episodes (5). In patients who developed AF during Holter recordings signs of an ...
... experimental reports have indicated that an imbalance of autonomic control mechanisms due to either an increase in vagal or sympathetic neural activity directed to the heart may favor the initiation and maintenance of AF episodes (5). In patients who developed AF during Holter recordings signs of an ...
100708 Basic Dysrhythmias 2902KB Jan 14 2015 08:21:37 AM
... -PVC-Wide, Bizarre QRS Complex, Look at underlying rhythm. Can appear in couplets, triplets, or short runs of VT. Can be multi-focal or uni-focal. Caused by random firing within the ventricles. No atrial firing. -PAC-Conducted beat appearing in an otherwise normal rhythm. Stimuli originates within t ...
... -PVC-Wide, Bizarre QRS Complex, Look at underlying rhythm. Can appear in couplets, triplets, or short runs of VT. Can be multi-focal or uni-focal. Caused by random firing within the ventricles. No atrial firing. -PAC-Conducted beat appearing in an otherwise normal rhythm. Stimuli originates within t ...
Cardiovascular System
... Cells are tethered together by a layer of fiberous tissue that crosses ...
... Cells are tethered together by a layer of fiberous tissue that crosses ...
EXPERIMENT-3 STUDY OF THE EFFECT OF VARIOUS DRUGS AND …
... altered then heart rate and contractility are changed. e.g. excess of potassium ions in the fluids perfusing the heart causes the heart to become dilated and slows the heart rate and may stop heart during diastole . ...
... altered then heart rate and contractility are changed. e.g. excess of potassium ions in the fluids perfusing the heart causes the heart to become dilated and slows the heart rate and may stop heart during diastole . ...
experiment-3 study of the effect of various drugs and ions
... altered then heart rate and contractility are changed. e.g. excess of potassium ions in the fluids perfusing the heart causes the heart to become dilated and slows the heart rate and may stop heart during diastole . ...
... altered then heart rate and contractility are changed. e.g. excess of potassium ions in the fluids perfusing the heart causes the heart to become dilated and slows the heart rate and may stop heart during diastole . ...
Cardiovascular System: Heart and Blood Vessels Physiology Study
... before the stenotic valve and requires a greater force to move the blood to the next chamber. For example, when the opening of the aortic valve becomes narrowed (stenotic), the blood can't be pumped adequately and the pressure in the left ventricle increases. Initially, the left ventricle compensate ...
... before the stenotic valve and requires a greater force to move the blood to the next chamber. For example, when the opening of the aortic valve becomes narrowed (stenotic), the blood can't be pumped adequately and the pressure in the left ventricle increases. Initially, the left ventricle compensate ...
CVS Physiology
... • CVS is one of the first systems to develop • First three weeks from the mesodermally derived endothelial cells • 4 weeks bilateral cardiogenic cords • Initial contraction at 21 to 22 days • Unidirectional blood flow in week 4 and further differentiation throughout to week 7 into four chambers ...
... • CVS is one of the first systems to develop • First three weeks from the mesodermally derived endothelial cells • 4 weeks bilateral cardiogenic cords • Initial contraction at 21 to 22 days • Unidirectional blood flow in week 4 and further differentiation throughout to week 7 into four chambers ...
Introduction to Echocardiography
... Echocardiography uses high-frequency sound waves (also called ultrasound) that can provide a moving picture of your heart. The sound waves are sent through the body with a device called a transducer. The sound waves bounce off of the heart and return to the transducer as echoes. The echoes are conve ...
... Echocardiography uses high-frequency sound waves (also called ultrasound) that can provide a moving picture of your heart. The sound waves are sent through the body with a device called a transducer. The sound waves bounce off of the heart and return to the transducer as echoes. The echoes are conve ...
dysrhythmias
... • Pulse generator is internal and surgically implanted in a subcutaneous pocket under the clavicle or abdominal wall • The leads are passed transvenously via the cephalic or subclavian vein to the endocardium on the right side of the heart • May be single-chambered, in which the lead wire is placed ...
... • Pulse generator is internal and surgically implanted in a subcutaneous pocket under the clavicle or abdominal wall • The leads are passed transvenously via the cephalic or subclavian vein to the endocardium on the right side of the heart • May be single-chambered, in which the lead wire is placed ...
Mechanisms of Tachycardia
... ○ Defibrillation is often ineffective in such patients (cardiac tissue is refractory for longer periods of time, so defibrillation cannot work) ...
... ○ Defibrillation is often ineffective in such patients (cardiac tissue is refractory for longer periods of time, so defibrillation cannot work) ...
Asymptomatic Metastasis of Hepatocellular Carcinoma into the Right
... Transthoracic echocardiography and the MRI were the mainstays of diagnosis in the cases to identify the extent of involvement, RVOT obstruction and pericardial effusion. In this patient, no obvious symptoms or signs of right heart failure were noted initially. Echocardiography was arranged because t ...
... Transthoracic echocardiography and the MRI were the mainstays of diagnosis in the cases to identify the extent of involvement, RVOT obstruction and pericardial effusion. In this patient, no obvious symptoms or signs of right heart failure were noted initially. Echocardiography was arranged because t ...
Lab Exam 2 Study Guide
... - When measuring blood pressure, how did you distinguish the systolic and diastolic pressures? - What are the sounds of Korotkoff? - From what artery is blood pressure measured? - What causes the systolic and diastolic blood pressures? - What is Mean Arterial Pressure, and how is it calculated? - As ...
... - When measuring blood pressure, how did you distinguish the systolic and diastolic pressures? - What are the sounds of Korotkoff? - From what artery is blood pressure measured? - What causes the systolic and diastolic blood pressures? - What is Mean Arterial Pressure, and how is it calculated? - As ...
Cardio-Pulmonary Resuscitation (CPR)
... depends upon, apart from the rate of compression, also on the number and duration of interruptions for the other steps of CPR. • Rationale for Recovery position The principle behind this position is to place the patient as near lateral position as possible with the head dependent so that any secreti ...
... depends upon, apart from the rate of compression, also on the number and duration of interruptions for the other steps of CPR. • Rationale for Recovery position The principle behind this position is to place the patient as near lateral position as possible with the head dependent so that any secreti ...
Anatomy and Physiology. Cardiac and Conduction System.
... • To understand the physiology of the cardiac conduction system. • To understand the relationship between electro-physiology and cardiac output. • To understand the basis of ECG wave ...
... • To understand the physiology of the cardiac conduction system. • To understand the relationship between electro-physiology and cardiac output. • To understand the basis of ECG wave ...
WHAT IS ATRIAL FIBRILLATION?
... medical history by a physician are crucial to diagnosing atrial fibrillation. An electrocardiogram (ECG or EKG) confirms the diagnosis. During an ECG, sensors are attached to the chest, arms and legs to detect and record the electrical activity of the heart. Sometimes, a doctor will need to view the ...
... medical history by a physician are crucial to diagnosing atrial fibrillation. An electrocardiogram (ECG or EKG) confirms the diagnosis. During an ECG, sensors are attached to the chest, arms and legs to detect and record the electrical activity of the heart. Sometimes, a doctor will need to view the ...
Open Access
... responsible for the body growth and development characteristics of childhood and adolescence. Previous reports in the literature on adult HCM patients [3,5-8] have not described HCM patients with prominent atrial enlargement on ECG as in the cases reported here. In consecutive 24 adult HCM patients ...
... responsible for the body growth and development characteristics of childhood and adolescence. Previous reports in the literature on adult HCM patients [3,5-8] have not described HCM patients with prominent atrial enlargement on ECG as in the cases reported here. In consecutive 24 adult HCM patients ...
Group4CHFexacerbate
... Mrs. G has come for a follow up appointment after a diagnosis of new atrial fibrillation and congestive heart failure. Comorbidities include hypothyroidism which was found to be inadequately treated while in hospital 2 weeks ago. On examination she has inspiratory basal crackles bilaterally and pitt ...
... Mrs. G has come for a follow up appointment after a diagnosis of new atrial fibrillation and congestive heart failure. Comorbidities include hypothyroidism which was found to be inadequately treated while in hospital 2 weeks ago. On examination she has inspiratory basal crackles bilaterally and pitt ...
Your Heart and How it works
... In order to understand heart surgery you must learn normal heart anatomy and how it works. While reading this guide please refer back to this section to help you understand you child's heart problem. The heart has four chambers-two atria and two ventricles, and it has four valves-the tricuspid and p ...
... In order to understand heart surgery you must learn normal heart anatomy and how it works. While reading this guide please refer back to this section to help you understand you child's heart problem. The heart has four chambers-two atria and two ventricles, and it has four valves-the tricuspid and p ...
Artificial Heart
... The AbioCor is the artificial heart is developed by Abiomed .The AbioCor heart, which is composed of titanium and plastic, connects to four locations: Right atrium Left atrium Aorta Pulmonary artery ...
... The AbioCor is the artificial heart is developed by Abiomed .The AbioCor heart, which is composed of titanium and plastic, connects to four locations: Right atrium Left atrium Aorta Pulmonary artery ...
Electrocardiography
Electrocardiography (ECG or EKG*) is the process of recording the electrical activity of the heart over a period of time using electrodes placed on a patient's body. These electrodes detect the tiny electrical changes on the skin that arise from the heart muscle depolarizing during each heartbeat.In a conventional 12 lead ECG, ten electrodes are placed on the patient's limbs and on the surface of the chest. The overall magnitude of the heart's electrical potential is then measured from twelve different angles (""leads"") and is recorded over a period of time (usually 10 seconds). In this way, the overall magnitude and direction of the heart's electrical depolarization is captured at each moment throughout the cardiac cycle. The graph of voltage versus time produced by this noninvasive medical procedure is referred to as an electrocardiogram (abbreviated ECG or EKG).During each heartbeat, a healthy heart will have an orderly progression of depolarization that starts with pacemaker cells in the sinoatrial node, spreads out through the atrium, passes through the atrioventricular node down into the bundle of His and into the Purkinje fibers spreading down and to the left throughout the ventricles. This orderly pattern of depolarization gives rise to the characteristic ECG tracing. To the trained clinician, an ECG conveys a large amount of information about the structure of the heart and the function of its electrical conduction system. Among other things, an ECG can be used to measure the rate and rhythm of heartbeats, the size and position of the heart chambers, the presence of any damage to the heart's muscle cells or conduction system, the effects of cardiac drugs, and the function of implanted pacemakers.