faisal2
... SA node 60-80 action potential /min (Pacemaker) AV node 40-60 action potential /min Purkinje 15-40 action potential /min Conduction Speed SA node: slow speed of conduction Ventricular and Atrial muscle: Moderate speed AV node: slowest speed of conduction Purkinje fibers: Fastest speed of ...
... SA node 60-80 action potential /min (Pacemaker) AV node 40-60 action potential /min Purkinje 15-40 action potential /min Conduction Speed SA node: slow speed of conduction Ventricular and Atrial muscle: Moderate speed AV node: slowest speed of conduction Purkinje fibers: Fastest speed of ...
Snímek 1 - med.muni
... The diagnosis of angina is largely based on the clinical history. The chest pain is generally described as 'heavy', 'tight' or 'gripping'. Typically, the pain is central/retrosternal and may radiate to the jaw and/or arms. Angina can range from a mild ache to a most severe pain that provokes sweatin ...
... The diagnosis of angina is largely based on the clinical history. The chest pain is generally described as 'heavy', 'tight' or 'gripping'. Typically, the pain is central/retrosternal and may radiate to the jaw and/or arms. Angina can range from a mild ache to a most severe pain that provokes sweatin ...
4.2.3.A EKGF
... Human body systems depend upon electrical impulses to send and receive messages. Electrical energy is what directs and choreographs the rhythmic beating of your heart. Each beat is initiated by an electrical signal. This electrical activity can be monitored and recorded in the form of a graph. The g ...
... Human body systems depend upon electrical impulses to send and receive messages. Electrical energy is what directs and choreographs the rhythmic beating of your heart. Each beat is initiated by an electrical signal. This electrical activity can be monitored and recorded in the form of a graph. The g ...
Prevalence of electrocardiographic changes in patients with acute
... with SAH are at high risk for malignant ventricular arrhythmias if the QTc interval is prolonged. [4‑6] A decrease in cardiac output due to alterations in heart rate associated with SAH, such as sinus bradycardia, sinus tachycardia, or rapid atrial fibrillation, can also adversely affect patients’ c ...
... with SAH are at high risk for malignant ventricular arrhythmias if the QTc interval is prolonged. [4‑6] A decrease in cardiac output due to alterations in heart rate associated with SAH, such as sinus bradycardia, sinus tachycardia, or rapid atrial fibrillation, can also adversely affect patients’ c ...
8. Cardiac Muscle Physiology
... Relaxation of ventricles, artery back flow slams semilunar valves shut = 2nd heart sound ("dup"). Sealed Compartment again – all valves are closed. Isovolumetric ventricular relaxation: => pressure as volume stays the same. The AV valves then open, refilling starts – back to start of cycle. ...
... Relaxation of ventricles, artery back flow slams semilunar valves shut = 2nd heart sound ("dup"). Sealed Compartment again – all valves are closed. Isovolumetric ventricular relaxation: => pressure as volume stays the same. The AV valves then open, refilling starts – back to start of cycle. ...
Skill Lab #1: Abnormal ECG Interpretation and
... Differential Diagnosis: (PIRATES- Pulmonary disease, Ischemia, Rheumatic heart disease, Anemia, atrial myxoma, Thyrotoxiosis, Ethanol, Sepsis) cardiac valve disorder, hypertensive cardiovascular disease, cardiomyopathy, MI, thyrotoxicosis, COPD, constrictive pericarditis, CHF, certain drugs. Signs & ...
... Differential Diagnosis: (PIRATES- Pulmonary disease, Ischemia, Rheumatic heart disease, Anemia, atrial myxoma, Thyrotoxiosis, Ethanol, Sepsis) cardiac valve disorder, hypertensive cardiovascular disease, cardiomyopathy, MI, thyrotoxicosis, COPD, constrictive pericarditis, CHF, certain drugs. Signs & ...
Systolic and diastolic heart failure: similarities and
... different heart disease has been changed. The mortality from acute myocardial infarction has significantly decreased — patients survive, but they often have the residual left ventricular dysfunction and the subsequent development of HF syndrome. Also, the overall life expectancy has become increasin ...
... different heart disease has been changed. The mortality from acute myocardial infarction has significantly decreased — patients survive, but they often have the residual left ventricular dysfunction and the subsequent development of HF syndrome. Also, the overall life expectancy has become increasin ...
ECG - A Pictorial Primer
... Heart rate of a normal adult patient at rest is between 60 and 100 beats/min. A heart rate slower than 60 beats/min is called bradycardia; a heart rate faster than 100 beats/min is called tachycardia. To determine the heart rate from a recording made by modern ECG machines is relatively simple. Thes ...
... Heart rate of a normal adult patient at rest is between 60 and 100 beats/min. A heart rate slower than 60 beats/min is called bradycardia; a heart rate faster than 100 beats/min is called tachycardia. To determine the heart rate from a recording made by modern ECG machines is relatively simple. Thes ...
QT INTERVAL AND DRUG-INDUCED CHANGES 1Souza, A. C.M.
... and “cardiotoxic drugs”. Theoretical literature information was obtained after selection of articles that describe ECG alterations induced by drugs with different therapeutic goals. According to “FDA Guidance for Industry S7B Nonclinical Evaluation of the Potential for Delayed Ventricular Repolariza ...
... and “cardiotoxic drugs”. Theoretical literature information was obtained after selection of articles that describe ECG alterations induced by drugs with different therapeutic goals. According to “FDA Guidance for Industry S7B Nonclinical Evaluation of the Potential for Delayed Ventricular Repolariza ...
Anatomy of the conduction system
... His-Purkinje System and Ventricles The rapid spread of impulses through the ventricles is mediated by cells of the His-Purkinje system (HPS). The His bundle is located at the crest of the interventricular septum. The AV node terminates in the top of the His bundle which then branches into a left and ...
... His-Purkinje System and Ventricles The rapid spread of impulses through the ventricles is mediated by cells of the His-Purkinje system (HPS). The His bundle is located at the crest of the interventricular septum. The AV node terminates in the top of the His bundle which then branches into a left and ...
April 2007 CE Cardiology and 12-Lead EKG`s
... clip hair if necessary so electrodes adhere – Clean and dry skin surface gently rub skin area with gauze pad need to remove skin oils & dead skin if diaphoretic patient wipe with towel/gauze or use antiperspirant deodorant spray Patient ...
... clip hair if necessary so electrodes adhere – Clean and dry skin surface gently rub skin area with gauze pad need to remove skin oils & dead skin if diaphoretic patient wipe with towel/gauze or use antiperspirant deodorant spray Patient ...
(2) The Heart
... Intrinsic Cardiac Conduction System The heart beats every 0.8 seconds (cardiac cycle) or 75 beats per minute With each beat the heart pumps 70 ml of blood (stroke volume) out of both the left and right ventricles. Cardiac output = 5.25 L per minute = 70 ml/beat x ...
... Intrinsic Cardiac Conduction System The heart beats every 0.8 seconds (cardiac cycle) or 75 beats per minute With each beat the heart pumps 70 ml of blood (stroke volume) out of both the left and right ventricles. Cardiac output = 5.25 L per minute = 70 ml/beat x ...
Member Updates - Sarver Heart Center
... rhythm disorders, such as atrial fibrillation and ventricular tachycardia. Dr. Hutchinson comes from University of Pennsylvania where he has been an associate professor of medicine at the Perelman School of Medicine. He completed his medical degree at St. Louis University School of Medicine and his ...
... rhythm disorders, such as atrial fibrillation and ventricular tachycardia. Dr. Hutchinson comes from University of Pennsylvania where he has been an associate professor of medicine at the Perelman School of Medicine. He completed his medical degree at St. Louis University School of Medicine and his ...
Atrial and Ventricular Enlargement
... a. increase size of heart muscle fibers b. e.g. aortic stenosis ...
... a. increase size of heart muscle fibers b. e.g. aortic stenosis ...
Slide 1 - Annals of Internal Medicine
... therapeutic window. For patients with recurrent rapid atrial fibrillation despite attempts at rate control, consideration should be given to restoring sinus rhythm by using antiarrhythmic medication or electrical cardioversion. Whichever strategy is used, patients should be maintained on their atria ...
... therapeutic window. For patients with recurrent rapid atrial fibrillation despite attempts at rate control, consideration should be given to restoring sinus rhythm by using antiarrhythmic medication or electrical cardioversion. Whichever strategy is used, patients should be maintained on their atria ...
summation and tetanus of cardiac muscle is impossible
... • Interconnected by intercalated discs and form functional syncytia • Within intercalated discs – two kinds of membrane junctions – Desmosomes – Gap junctions ...
... • Interconnected by intercalated discs and form functional syncytia • Within intercalated discs – two kinds of membrane junctions – Desmosomes – Gap junctions ...
cardiac muscle
... • Interconnected by intercalated discs and form functional syncytia • Within intercalated discs – two kinds of membrane junctions – Desmosomes – Gap junctions ...
... • Interconnected by intercalated discs and form functional syncytia • Within intercalated discs – two kinds of membrane junctions – Desmosomes – Gap junctions ...
Chapter 4 Cardiovascular
... • Sinoatrial Node - specialized group of pacemaker cells in the right atrium that send out electrical signals to surrounding cells; forces atrial contraction and pumps blood to ventricles • Atrioventricular Node - picks up signal from SA node, sends through to ventricles; blood is pumped out through ...
... • Sinoatrial Node - specialized group of pacemaker cells in the right atrium that send out electrical signals to surrounding cells; forces atrial contraction and pumps blood to ventricles • Atrioventricular Node - picks up signal from SA node, sends through to ventricles; blood is pumped out through ...
Wolff–Parkinson–White syndrome presenting as atrial fibrillation in a
... Introduction Wolff-Parkinson-White (WPW) syndrome is a conduction disturbance characterized by the presence of an accessory pathway between the atria and the ventricles (Kent bundle), which provides an alternative route for ventricular activation [1]. WPW syndrome may occur in patients with a normal ...
... Introduction Wolff-Parkinson-White (WPW) syndrome is a conduction disturbance characterized by the presence of an accessory pathway between the atria and the ventricles (Kent bundle), which provides an alternative route for ventricular activation [1]. WPW syndrome may occur in patients with a normal ...
Ventricular tachycardia of right bundle-branch block
... taken during sinus rhythm was normal. Physical examination disclosed a mid-systolic click and a late systolic murmur. Echocardiography showed bileaflet mitral valve prolapse. A radionuclear scan showed normal right and left ventricular function. Past medical history was unremarkable. Family history ...
... taken during sinus rhythm was normal. Physical examination disclosed a mid-systolic click and a late systolic murmur. Echocardiography showed bileaflet mitral valve prolapse. A radionuclear scan showed normal right and left ventricular function. Past medical history was unremarkable. Family history ...
EKG - Birdville High School
... ▪ The S-A node controls your heart rate, it is called your heart's "natural pacemaker." Electrical signals created by the S-A node travel down pathways to the A-V node creating the P WAVE ▪ It has as inherent rate of 60-100 bpm ▪ Step Two: The signal follows natural pathways through both atria. This ...
... ▪ The S-A node controls your heart rate, it is called your heart's "natural pacemaker." Electrical signals created by the S-A node travel down pathways to the A-V node creating the P WAVE ▪ It has as inherent rate of 60-100 bpm ▪ Step Two: The signal follows natural pathways through both atria. This ...
Slide ()
... Response of narrow complex tachycardias to adenosine. AT, atrial tachycardia; AVNRT, atrioventricular nodal reentrant tachycardia; AVRT, atrioventricular reciprocating tachycardia; IV, intravenous; VT, ventricular tachycardia. (From Blomstrom-Lundqvist C, Scheinman M, Aliot E, et al. ACC/AHA/ESC gui ...
... Response of narrow complex tachycardias to adenosine. AT, atrial tachycardia; AVNRT, atrioventricular nodal reentrant tachycardia; AVRT, atrioventricular reciprocating tachycardia; IV, intravenous; VT, ventricular tachycardia. (From Blomstrom-Lundqvist C, Scheinman M, Aliot E, et al. ACC/AHA/ESC gui ...
DS-11719 GRFW HA VS CA infographic
... is not reopened quickly, the part of the heart normally nourished by that artery begins to die. ...
... is not reopened quickly, the part of the heart normally nourished by that artery begins to die. ...
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.