Influence of Psychological Stress on Systolic
... repolarization characteristics were reported to be affected by stress in several studies [4, 5]. Increase in heart rate (i.e. decreases in RR interval in ECG), heart rate variability, alteration in QT interval (i.e. ventricular repolarization duration), and increases in QT variability are the major ...
... repolarization characteristics were reported to be affected by stress in several studies [4, 5]. Increase in heart rate (i.e. decreases in RR interval in ECG), heart rate variability, alteration in QT interval (i.e. ventricular repolarization duration), and increases in QT variability are the major ...
High-pressure balloon angioplasty of coronary sinus vein
... the opinion of the authors small veins angioplasty during CRT implantation in fact does not dilate stenotic changes, but actually removes obstacles for lead positioning. In one of the presented case, there was no haemodynamic symptoms of CS stenosis. The most probable reason for the difficulty of ele ...
... the opinion of the authors small veins angioplasty during CRT implantation in fact does not dilate stenotic changes, but actually removes obstacles for lead positioning. In one of the presented case, there was no haemodynamic symptoms of CS stenosis. The most probable reason for the difficulty of ele ...
Sudden Cardiac Death in Three Generations of the Same Family: A
... puffiness. He gave history of occasional leg swelling for few months before admission which could be alleviated by taking some medications. Those periods of leg swelling were associated with palpitation and used to last for days to weeks. According to his mother’s statement he never played like an a ...
... puffiness. He gave history of occasional leg swelling for few months before admission which could be alleviated by taking some medications. Those periods of leg swelling were associated with palpitation and used to last for days to weeks. According to his mother’s statement he never played like an a ...
The string galvanometer and the measurement
... in the base of the heart whilst nevertheless the direction of potential difference measured at the hands and feet indicates a negativity of the apex to the base. For, the direction of the created potential difference is determined not by the position of the wave in the heart, but by the position of ...
... in the base of the heart whilst nevertheless the direction of potential difference measured at the hands and feet indicates a negativity of the apex to the base. For, the direction of the created potential difference is determined not by the position of the wave in the heart, but by the position of ...
The Cardiovascular System - Bishop Allen Academy Health and
... How the Chambers know when to contract Cardiac ...
... How the Chambers know when to contract Cardiac ...
Dobutamine Stress Test - Progressive Medical Clinic
... WHAT ARE THE SIDE EFFECTS OF DOBUTAMINE? Side effects may occur during Dobutamine infusion, but they are usually mild and last only for a few minutes. They may include chest discomfort, headache, palpitations, nausea or shortness of breath. These symptoms are relieved quickly when the Dobutamine is ...
... WHAT ARE THE SIDE EFFECTS OF DOBUTAMINE? Side effects may occur during Dobutamine infusion, but they are usually mild and last only for a few minutes. They may include chest discomfort, headache, palpitations, nausea or shortness of breath. These symptoms are relieved quickly when the Dobutamine is ...
File
... Electrical conduction system: specialized cardiac muscle cells that carry impulses throughout the heart musculature, signaling the chambers to contract in the proper sequence ...
... Electrical conduction system: specialized cardiac muscle cells that carry impulses throughout the heart musculature, signaling the chambers to contract in the proper sequence ...
Congenital Heart Disease - Cleveland Clinic Center for Continuing
... ACC/AHA 2008 Guidelines for the Management of Adults With Congenital Heart Disease ...
... ACC/AHA 2008 Guidelines for the Management of Adults With Congenital Heart Disease ...
Chest X-Ray Interpretation for the Internist
... Heavy light exposure causes the film to be black (A) Little light exposure causes the film to be white (B) ...
... Heavy light exposure causes the film to be black (A) Little light exposure causes the film to be white (B) ...
Post Operative Arrhythmias
... The Electrocardiogram (ECG) is a reliable and practical way to document the underlying cardiac rhythm. It essentially consists of a recording obtained by 12 surface leads which trace the electrical activity of the heart from different directions. The 12 leads include 6 limb and 6 precordial leads. T ...
... The Electrocardiogram (ECG) is a reliable and practical way to document the underlying cardiac rhythm. It essentially consists of a recording obtained by 12 surface leads which trace the electrical activity of the heart from different directions. The 12 leads include 6 limb and 6 precordial leads. T ...
An Spatio-temporal Mesh Model Of the Heart
... In this model, based on the macroscopic Fitzhugh-Nagumo model (F-N) with local Rudy-Hund (R-H) single cell interaction, the electrophysiological potential of a node in the mesh changes as a function of the electrophysiological potential of its nearest neighbors and its own state – which depends on i ...
... In this model, based on the macroscopic Fitzhugh-Nagumo model (F-N) with local Rudy-Hund (R-H) single cell interaction, the electrophysiological potential of a node in the mesh changes as a function of the electrophysiological potential of its nearest neighbors and its own state – which depends on i ...
Isolated Perfused Heart Models in Rats and Mice
... the heart is perfused in a retrograde direction with blood or, more commonly, oxygenated nutrient rich crystalloid solution from a gravity fed reservoir. Pressure from the retrograde perfusion causes the aortic valve to close and forces the solution into the coronary circulation, draining via the co ...
... the heart is perfused in a retrograde direction with blood or, more commonly, oxygenated nutrient rich crystalloid solution from a gravity fed reservoir. Pressure from the retrograde perfusion causes the aortic valve to close and forces the solution into the coronary circulation, draining via the co ...
T400-Series Surgical Protocol
... Fig. 2: Schematic of the working heart model of The Langendorff isolated heart method was modified an isolated perfused heart preparation. later by Neely et al to produce a model that would allow the study of the isolated heart under normal circulatory dynamics. In the working heart model, a second ...
... Fig. 2: Schematic of the working heart model of The Langendorff isolated heart method was modified an isolated perfused heart preparation. later by Neely et al to produce a model that would allow the study of the isolated heart under normal circulatory dynamics. In the working heart model, a second ...
The heart is complicated, hard-working organ (Heart Attack, 2003
... The cause of cardiac arrest is by problems in the coronary arteries, which supply blood to the heart muscle. When blood supply is interrupted, the heart cannot work properly (Heart Attack, 2003). In a heart attack, or coronary thrombosis, a clot in the artery cuts off the blood supply to part of th ...
... The cause of cardiac arrest is by problems in the coronary arteries, which supply blood to the heart muscle. When blood supply is interrupted, the heart cannot work properly (Heart Attack, 2003). In a heart attack, or coronary thrombosis, a clot in the artery cuts off the blood supply to part of th ...
ТАШКЕНТСКАЯ МЕДИЦИНСКАЯ АКАДЕМИЯ
... used drug lidocaine. It is most effective. Injected lidocaine intramuscularly and intravenously. In case of failure is assigned novokainamid, ritmilen, kordaron. If you can not restore the rhythm used countershock. If the attack of paroxysmal tachycardia in a patient came first, the patient must be ...
... used drug lidocaine. It is most effective. Injected lidocaine intramuscularly and intravenously. In case of failure is assigned novokainamid, ritmilen, kordaron. If you can not restore the rhythm used countershock. If the attack of paroxysmal tachycardia in a patient came first, the patient must be ...
Chapter 20 The Cardiovascular System: The Heart Heart pumps
... Collects wastes from cardiac muscle ...
... Collects wastes from cardiac muscle ...
8 Pulseless Electrical Activity
... left ventricular myocardial impairment. First, regardless the pathological etiology, failure of adequate oxygen delivery to myocyte mitochondria reduces energy supplies for cytoplasmic processes. As such, ischemic metabolites accumulate and ATP stores are depleted. Originally, loss of high-energy ph ...
... left ventricular myocardial impairment. First, regardless the pathological etiology, failure of adequate oxygen delivery to myocyte mitochondria reduces energy supplies for cytoplasmic processes. As such, ischemic metabolites accumulate and ATP stores are depleted. Originally, loss of high-energy ph ...
Recent Trends in Medical Imaging by using VLSI
... Ventricular – inhabited type. Programmed from the QRS complex, it delivers its impulses only when patient’s Ventricular rate falls below the preset pacing rate of the pulse Generator (Pacemaker). Rate is preset during manufacture at a nominal 72 pulse per minute (PPM), but rates 60 to 72 are availab ...
... Ventricular – inhabited type. Programmed from the QRS complex, it delivers its impulses only when patient’s Ventricular rate falls below the preset pacing rate of the pulse Generator (Pacemaker). Rate is preset during manufacture at a nominal 72 pulse per minute (PPM), but rates 60 to 72 are availab ...
Survival After Long-Term Cardiopulmonary Resuscitation Through
... soon as possible. Interventions such as rapid chain of survival including early identification, asking for help, beginning rapid cardiopulmonary resuscitation (CPR), faster defibrillation and postresuscitation cares should be considered (1). Primary ventricular fibrillation happens following acute m ...
... soon as possible. Interventions such as rapid chain of survival including early identification, asking for help, beginning rapid cardiopulmonary resuscitation (CPR), faster defibrillation and postresuscitation cares should be considered (1). Primary ventricular fibrillation happens following acute m ...
PDF
... divided by the cardio-thoracic ratio in order to take into account the relative differences in cardiac and thoracic sizes among patients, thus providing corrected inter-lead distances (CID): the direct (DCID) and the horizontal (HCID) corrected RV–LV electrode tip separation ...
... divided by the cardio-thoracic ratio in order to take into account the relative differences in cardiac and thoracic sizes among patients, thus providing corrected inter-lead distances (CID): the direct (DCID) and the horizontal (HCID) corrected RV–LV electrode tip separation ...
How to answer questions about warming up
... The first stage of any warm-up is to perform some kind of cardiovascular exercise such as jogging, gently increasing your heart rate. The second stage is the performance of stretching/flexibility exercises, especially using those joints and muscles that will be most active during the training sessio ...
... The first stage of any warm-up is to perform some kind of cardiovascular exercise such as jogging, gently increasing your heart rate. The second stage is the performance of stretching/flexibility exercises, especially using those joints and muscles that will be most active during the training sessio ...
THE HEART IN THE PNEUMOCONIOSIS OF COALMINERS
... size of the hearts of those in failure is small, relative smaller than usual and an S wave persists. The to those with the same degree of heart failure from QRS deflections are not usually large, nor is the QRS interval wider than normal. other cardiovascular diseases. The standard limb leads have b ...
... size of the hearts of those in failure is small, relative smaller than usual and an S wave persists. The to those with the same degree of heart failure from QRS deflections are not usually large, nor is the QRS interval wider than normal. other cardiovascular diseases. The standard limb leads have b ...
Differential diagnosis
... murmur (heard in pulmonic area) Diastolic rumble across the tricuspid valve Neck vein distention Ascites Edema ...
... murmur (heard in pulmonic area) Diastolic rumble across the tricuspid valve Neck vein distention Ascites Edema ...
A Technique for Aortic Valve Replacement on the Beating Heart
... The retrospective analyses of ECG, comparing preoperative with postoperative ECG on day 1, as well as before discharge, did not show any signs of myocardial infarction. Some studies even showed [3] that the coronary sinus can withstand a somewhat higher pressure well during retrograde cardioplegia a ...
... The retrospective analyses of ECG, comparing preoperative with postoperative ECG on day 1, as well as before discharge, did not show any signs of myocardial infarction. Some studies even showed [3] that the coronary sinus can withstand a somewhat higher pressure well during retrograde cardioplegia a ...
Unroofed Coronary Sinus – A Rare Type of ASD
... in the left atrioventricular groove (figure 1, 2) and there was also a 2.2 cm segment of abnormal communication between the base of the left atrium and the roof of the coronary sinus, consistent with an unroofed coronary sinus (figure 3). There was no evidence of persistent left sided superior vena ...
... in the left atrioventricular groove (figure 1, 2) and there was also a 2.2 cm segment of abnormal communication between the base of the left atrium and the roof of the coronary sinus, consistent with an unroofed coronary sinus (figure 3). There was no evidence of persistent left sided superior vena ...
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.