42 Bilder zum Thema "limb lead" bei ClipDealer

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Einthoven triangle assumes that the left upper limb, right upper limb and left lower limb form an equilateral triangle, and the heart is located at the center of the triangle.
In the conventional 12 lead ECG, the chest lead system represents the electrical activity in the transverse or horizontal plane, and there are 6 traditional leads.
Male, 23 years old, healthy. When the initial excitation potential of the ventricle deviates from a certain lead axis, a Q wave will be projected onto that lead, which is a physiological Q wave.
When the R wave amplitude of lead V1 in adults exceeds 6mm and there are no organic heart disease or other disease electrocardiogram changes, it is a simple right ventricular high voltage.
In ventricular septal defects, left ventricular hypertrophy, biventricular hypertrophy, or right ventricular hypertrophy ECG may be present.
Sometimes, the amplitude of sinus P wave is extremely low, close to equipotential line, and it is easy to be misdiagnosed as junctional rhythm.
In the first degree of atrioventricular block, the PR interval was prolonged by more than 200ms, and there was no QRS wave loss in ECG. The blocking site can occur anywhere in the conduction system.
The electrocardiogram diagnosis of first-degree atrioventricular block is relatively simple, with an adult PR interval greater than 200ms and no QRS wave shedding.
Patients with ventricular septal defects have left ventricular hypertrophy in the early stage and biventricular hypertrophy in the middle and late stages.
In the first degree of atrioventricular block, the PR interval was prolonged by more than 200ms, and there was no QRS wave loss in ECG. The blocking site can occur anywhere in the conduction system.
Simple left ventricular high voltage has no abnormalities such as left atrial abnormality, left axis deviation and ST-T change, but the amplitude of R wave in left chest lead is increased.
In the frontal lead system, the lead axes of the 6 limb leads form a hexaxial reference system, which is one of the important theories of electrocardiography.
Ventricular high voltage refers to an increase in R-wave amplitude, which can be both a normal variation and an electrocardiographic indicator of ventricular hypertrophy.
Under normal circumstances, when the initial excitation potential of the ventricle is far away from a certain lead axis, a Q wave will be projected on that lead, which is a physiological Q wave.
In frontal lead system, anatomical transposition and electrical transposition are not in good agreement, because some electrical transposition has nothing to do with anatomy.
The QT interval of ECG is from the beginning of QRS wave to the end of T wave, representing the total time of ventricular depolarization and repolarization.
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During left posterior fascicular block, the ECG showed right axis deviation. The QRS wave in leads I and aVL was rS wave, and the duration of QRS wave was less than 120 ms.
R wave greater than S wave is judged to be positive; R smaller than S is judged to be negative; R equal to S amplitude is judged to be equipotential.
A 36 year old man survived CPR after sudden syncope. The electrocardiogram was suggestive of Brugada syndrome type 1. Implantation of ICD therapy.
Ventricular tachyarrhythmia includes many clinical types, some benign and some malignant. For malignant ventricular arrhythmias, patients are at risk of death.
When sinus arrest occurs, the electrocardiogram will show a long P-P interval, which is not multiples of the basal sinus cycle, including physiological and pathological reasons.
When measuring the cardiac cycle, select leads with stable ECG waveform and choose ECG waves from the same location as the measurement reference point.
If atrioventricular dissociation can be observed during wide QRS wave tachycardia, it can help diagnose ventricular tachycardia.
In ST segment elevation myocardial infarction, the ST-T of ECG will undergo a characteristic evolution process, and finally appear pathological Q wave, sometimes lasting for a lifetime.
In acute myocardial ischemia, the amplitude of T wave is increased first, and then the ST segment is elevated. When the end of QRS wave is deformed, there is a lack of collateral circulation.
The chest electrode of ECG includes conventional chest lead, posterior wall lead and right ventricular lead. The placement of chest lead electrode shall comply with the specification.
Female, 6 years old, clinically diagnosed with Tetralogy of Fallot. The electrocardiogram shows sinus rhythm, extreme right axis deviation, biatria abnormality, right ventricular hypertrophy, etc.
Male, 75 years old, clinically diagnosed as acute anterior septal and high lateral myocardial infarction.The culprit vessel was located in the LAD proximal segment.Prolonged QT interval with TDP.
In the aVR lead, the QRS wave can have an initial r wave or no initial r wave, depending on whether the initial excitation is directed upwards or downwards.
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Ventricular fibrillation is a fatal arrhythmia and also a cardiac arrest rhythm. It can be divided into coarse fibrillation and fine fibrillation according to the amplitude of the fibrillation wave.
When the frontal QRS axis is at +57, the QRS amplitude of lead is the highest.The frontal electrical axis is almost perpendicular to aVL lead, so the algebraic sum of QRS amplitude is almost zero.
In measuring the cardiac cycle, it is necessary to select the same component of adjacent cardiac waves and the same measurement reference point, such as measuring the PP interval and RR interval.
Male, 75 years old, clinically diagnosed as acute anterior septal myocardial infarction.It is best to use 12 leads to diagnose torsade de pointes because some leads may not have torsade characteristic
When ventricular hypertrophy occurs, the amplitude of the S-wave in each lead will change, which is a clue for electrocardiogram diagnosis of ventricular hypertrophy.
When the atrium and ventricle maintain a 1:1 conduction relationship, the atrial rate and ventricular rate are the same, otherwise they need to be evaluated separately.

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