40 Bilder zum Thema "depolarization" bei ClipDealer

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The upper limit value of R wave amplitude in each lead of ECG is related to age, sex, body shape, etc. Here are the ECG data of Japanese adults.
Early afterdepolarization is an arrhythmogenic mechanism that triggers activity, occurring before the end of the T wave and commonly seen in QT interval prolongation.
When intermittent conduction dysfunction occurs in the Bachmann bundle, intermittent left atrial abnormality may be seen on the ECG, which can be differentiated from anatomical left atrial enlargement.
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.
The classic pathological Q wave refers to a Q wave duration more than 40ms, with an amplitude greater than 25% R wave amplitude, commonly seen in cardiomyopathy and myocardial infarction.
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.
When measuring the cardiac cycle, select leads with stable ECG waveform and choose ECG waves from the same location as the measurement reference point.
The electrocardiogram diagnosis of first-degree atrioventricular block is relatively simple, with an adult PR interval greater than 200ms and no QRS wave shedding.
Ligand-dependent ion channel: attachment of a particular molecule causes the channel to open.
In the aVR lead, the QRS wave can be in the form of QS, rS, Qr, rsr, etc., with the main wave being negative.
Second degree rinteratrial block includes two types: type 1 block with progressive worsening of conduction and interruption of conduction, and type 2 block with fixed conduction and interruption.
Some measured values of ECG have differences in gender, age and race, for example, the QRS wave amplitude of Chinese is different from that of Caucasians.
In the 12 lead ecg, the highest R wave amplitude is commonly found in the left chest lead, while the lead with the deepest S wave amplitude is commonly found in the right chest lead.
Patients with ventricular septal defects have left ventricular hypertrophy in the early stage and biventricular hypertrophy in the middle and late stages.
Negative direction of QRS main wave in aVL lead
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.
Antidepressive drug (amitriptilyne) binding to and blocking a sodium channel
Phototransduction: operation of a photoreceptor in night vision.
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.
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.
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.
EKG or ECG (Electrocardiogram) graph report paper. EST ( Exercise Stress Test ) result and pink heart shape made from pills. Package promotion for heart check up in senior or elderly people concept.
The illustration shows the two patterns of ventricular tachycardia episodes.The green circle represents sinus rhythm. Picture A shows paroxysmal episodes of ventricular tachycardia, and picture B shows short bursts.
Male, 38 years old. There is no history of tachycardia in clinical practice. Electrocardiogram diagnosis: Sinus rhythm; Short PR interval; Early repolarization.
The calcium channel is composed of a hexameric assembly or Orai subunits around a central ion pore. The channel shows selective permeability to calcium ions.
Depolarization: phospholipid membrane with NA + and K + ion channels.
When the long axis of the heart swings up and down and left and right, it can cause a change in the polarity of the QRS main wave in the aVL and aVF leads, namely the horizontal and vertical heart.
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.
In the frontal plane lead system, when the maximum QRS wave potential is more parallel to a certain lead, the R wave amplitude of that lead is highest in the limb lead.
According to the relationship between the long axis of the heart and the horizontal axis of the direction, the heart shadow can be divided into three types: horizontal , oblique and vertical heart.
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.
Depolarization: phospholipid membrane with NA + and K + ion channels.
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.
When ectopic impulses originate in the left atrium, an upright P wave will be generated in V1 and an inverted P wave in lead aVL.
Sometimes, ventricular preexcitation waves are negative on some leads, so do not mistake them for pathological Q waves or old myocardial infarction.
The atrial foci originating from the anterior and posterior walls of the right atrium form an inverted P wave and positive and negative biphasic P wave in the V1 lead, respectively.
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.

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