ECG2
... If it is preceded by an R wave (+ve wave) then it is S not a Q. Indicate old myocardial infarction. Observe the distribution. II, III, aVF = inferior wall. I, aVL + V1,2 = anterior wall. + V3,4 = antero-septal. + V5,6 = antero-lateral wall. ...
... If it is preceded by an R wave (+ve wave) then it is S not a Q. Indicate old myocardial infarction. Observe the distribution. II, III, aVF = inferior wall. I, aVL + V1,2 = anterior wall. + V3,4 = antero-septal. + V5,6 = antero-lateral wall. ...
Tall R Wave in Lead V1
... resulting in QRS complexes, in the right precordial leads that are of large amplitude. In addition, deep but narrow Q waves are created from these same forces in the lateral leads (I, AVL, V5-V6) and occasionally in the inferior leads. Definitive diagnosis, if not obvious clinically, may require an ...
... resulting in QRS complexes, in the right precordial leads that are of large amplitude. In addition, deep but narrow Q waves are created from these same forces in the lateral leads (I, AVL, V5-V6) and occasionally in the inferior leads. Definitive diagnosis, if not obvious clinically, may require an ...
Introduction to the heart`s electrical conduction system
... Meanwhile, the impulse reaches the atrioventricular node, which lies between the atria and the ventricles, before travelling on through the bundle of His and right and left bundle branches. The ventricles, which have now had sufficient time to fill with blood, contract in response to the impulse. ...
... Meanwhile, the impulse reaches the atrioventricular node, which lies between the atria and the ventricles, before travelling on through the bundle of His and right and left bundle branches. The ventricles, which have now had sufficient time to fill with blood, contract in response to the impulse. ...
Chest pain and left bundle branch block
... infra-His, which is suggested by the LBBB, in the presence of fresh inferior myocardial infarction, the block is almost certainly at atrioventricular nodal level. ST-segment elevation in lead III greatly exceeds that in lead II, suggesting right coronary occlusion with right ventricular infarction, ...
... infra-His, which is suggested by the LBBB, in the presence of fresh inferior myocardial infarction, the block is almost certainly at atrioventricular nodal level. ST-segment elevation in lead III greatly exceeds that in lead II, suggesting right coronary occlusion with right ventricular infarction, ...
Sanford Cardiac Rhythm Center
... may be causing the irregular heartbeat. • Electrocardiography (ECG): A test that measures the electrical activity of your heart through electrodes attached to the skin on your chest, arms, and legs. • ECG stress testing: Monitors heart rhythm during exercise. • Echocardiography: Produces detailed ...
... may be causing the irregular heartbeat. • Electrocardiography (ECG): A test that measures the electrical activity of your heart through electrodes attached to the skin on your chest, arms, and legs. • ECG stress testing: Monitors heart rhythm during exercise. • Echocardiography: Produces detailed ...
How do arrhythmias occur? - Anesthesiology, Pharmacology and
... – For benign and mild (asymptomatic) the therapeutic risk is greater than the disease burden • Electric shock – Electrical cardioversion – Brief external shocks to synchronize heart beat • Effective and safe, but expensive: requires fasting, sedation, delay and unpleasant to patient • Ablation ...
... – For benign and mild (asymptomatic) the therapeutic risk is greater than the disease burden • Electric shock – Electrical cardioversion – Brief external shocks to synchronize heart beat • Effective and safe, but expensive: requires fasting, sedation, delay and unpleasant to patient • Ablation ...
Arrhythmias without axis
... Premature Ventricular Contractions (PVCs) Prolong QRS complex because the impulses are carried out with myocardial fibers with slower conduction rate than Purkinje fibers Increase QRS complexes voltage because QRS wave from one ventricle can not neutralize the one from the other ventricle Aft ...
... Premature Ventricular Contractions (PVCs) Prolong QRS complex because the impulses are carried out with myocardial fibers with slower conduction rate than Purkinje fibers Increase QRS complexes voltage because QRS wave from one ventricle can not neutralize the one from the other ventricle Aft ...
Jorgensen_J1010 Manual_0211.indd
... bottom of the heart, a much larger signal will be obtained. The plane in which the cat’s heart lies within its body may also vary. The “top” of the heart may be more dorsal and the “bottom” more ventral. In this case, we would refer to the base/apex axis (see figure 2) when the following instruction ...
... bottom of the heart, a much larger signal will be obtained. The plane in which the cat’s heart lies within its body may also vary. The “top” of the heart may be more dorsal and the “bottom” more ventral. In this case, we would refer to the base/apex axis (see figure 2) when the following instruction ...
Renal Tubular Function
... • Phase 1: partial repolarization is inactivation of the voltage-sensitive Na+ channels • Phase 2: plateau held near zero by current through ...
... • Phase 1: partial repolarization is inactivation of the voltage-sensitive Na+ channels • Phase 2: plateau held near zero by current through ...
EKG
... • The Augmented Leads are formed by sending the non-selected arm or leg through the Central Terminal of Wilson ( 5,000 Ohm resistor). The Central Terminal of Wilson acts as the null point. This null point is obtained for each lead by adding the potential from the other two leads. For example, in lea ...
... • The Augmented Leads are formed by sending the non-selected arm or leg through the Central Terminal of Wilson ( 5,000 Ohm resistor). The Central Terminal of Wilson acts as the null point. This null point is obtained for each lead by adding the potential from the other two leads. For example, in lea ...
Premature Ventricular Contractions (PVCs)
... that holds the “pacemaker” cells, which establish the heart rate. The normal pathway is handing the signal one cell to the next, or top-to-bottom. Every heart cell has the ability to start a beat and PVC’s do just that, reversing the pathway from bottomtop. These are typically self-limiting and only ...
... that holds the “pacemaker” cells, which establish the heart rate. The normal pathway is handing the signal one cell to the next, or top-to-bottom. Every heart cell has the ability to start a beat and PVC’s do just that, reversing the pathway from bottomtop. These are typically self-limiting and only ...
File - Kelly Marchant RN
... 18. Your patient’s telemetry displays ventricular fibrillation. You assess the patient who is nonresponsive and with out a pulse or respirations. The most appropriate nursing intervention to perform would be A. A precordial thump *B. Defibrillation C. Chest compressions D. Administer 10 mg Atropine ...
... 18. Your patient’s telemetry displays ventricular fibrillation. You assess the patient who is nonresponsive and with out a pulse or respirations. The most appropriate nursing intervention to perform would be A. A precordial thump *B. Defibrillation C. Chest compressions D. Administer 10 mg Atropine ...
ELECTROCARDIOGRAPH
... Short PR interval may be seen in Wolff-Parkinson-White & Lown-Ganong-Levine syndromes and in glycogen storage disease. Variable PR intervals occur in second degree AV blockade (Type I) and with a wandering ...
... Short PR interval may be seen in Wolff-Parkinson-White & Lown-Ganong-Levine syndromes and in glycogen storage disease. Variable PR intervals occur in second degree AV blockade (Type I) and with a wandering ...
Cardiovascular Disorders/homeostatic Imbalances
... • http://www.medindia.net/animation/heart_a ttack.asp ...
... • http://www.medindia.net/animation/heart_a ttack.asp ...
I. Multiple Choice: select the best answer (four points each)
... c) atrial systole d) atrial contraction 10. In looking at a patients’ EKG, lead I is generally upward. Lead AVF is generally downward. This might indicate: a) Right axis deviation b) Left axis deviation c) a normal electrical axis d) right ventricular hypertrophy 11. The gamma motor neuron: a) contr ...
... c) atrial systole d) atrial contraction 10. In looking at a patients’ EKG, lead I is generally upward. Lead AVF is generally downward. This might indicate: a) Right axis deviation b) Left axis deviation c) a normal electrical axis d) right ventricular hypertrophy 11. The gamma motor neuron: a) contr ...
ECG_TIPS
... This ECG shows a heart rate of 300, regular R-R interval and no P waves. The very high heart rate causes the P and T wave to fuse, so a distinct P wave is not evident. P waves are sometimes difficult to see in patients with a rapid ventricular tachycardia. However, as the sinus node and atria are a ...
... This ECG shows a heart rate of 300, regular R-R interval and no P waves. The very high heart rate causes the P and T wave to fuse, so a distinct P wave is not evident. P waves are sometimes difficult to see in patients with a rapid ventricular tachycardia. However, as the sinus node and atria are a ...
Heart block simplified
... The aim of this section is to remind the reader to be aware of the different types of heart block and understand key ECG features, thereby assisting in diagnosis. The aetiology or management of the heart block will not be discussed. ...
... The aim of this section is to remind the reader to be aware of the different types of heart block and understand key ECG features, thereby assisting in diagnosis. The aetiology or management of the heart block will not be discussed. ...
Classification of Right Bundle Branch Block and Left Bundle Branch
... an important role in the circulation of the blood throughout the body and also serves as the power source of the electrical impulses that generate the rhythmicity of the heart thus resulting in the successful circulation of the blood. Now any disturbance in the proper functioning of the heart result ...
... an important role in the circulation of the blood throughout the body and also serves as the power source of the electrical impulses that generate the rhythmicity of the heart thus resulting in the successful circulation of the blood. Now any disturbance in the proper functioning of the heart result ...
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.