39 Bilder zum Thema "depolarization" bei ClipDealer

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A normal electrocardiogram includes normal morphology, amplitude, and various measurements of duration and interval, normal electrical axis, and normal R wave progression.
Electric impulses can be conducted, but the conduction speed slows down, resulting in conduction delay and affecting the morphology of the P wave, PR interval, and QRS wave.
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.
The transverse vectorcardiogram generates a chest leads electrocardiogram, with the maximum ventricular excitation potential oriented towards the left posterior region.
When there is a the first degree interatrial block, the impulse from the right atrium is slowly transmitted to the left atrium, causing widening notched P wave.
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.
Under normal circumstances, in the chest lead electrocardiogram, the amplitude of the R wave gradually increases from lead V1 to lead V6.
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.
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.
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.
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.
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.
Antidepressive drug (amitriptilyne) binding to and blocking a sodium channel
Phototransduction: operation of a photoreceptor in night vision.
When Bachmann bundle conduction is interrupted, the right atrium excites the left atrium through the coronary sinus, producing positive and negative biphasic P-waves in the inferior leads.
When Bachmann bundle conduction is interrupted, the right atrium excites the left atrium through the coronary sinus, producing positive and negative biphasic P-waves in the inferior leads.
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.
The high lateral lead group includes leads I and aVL, used to explore the myocardium of the high lateralwall of the left ventricle.
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.
Under physiological conditions, the upward sloping ST segment depression forms a U-shaped curve, where the depressed PR segment, J point, and ST segment form a smooth parabola.
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.
Electric impulses can be conducted, but the conduction speed slows down, resulting in conduction delay and affecting the morphology of the P wave, PR interval, and QRS wave.
During ventricular depolarization, a spatial QRS loop is generated, projected onto the frontal lead system, forming the frontal QRS loop, which further forms the electrocardiogram.
Under normal circumstances, notch T waves are more common in leads V2-V3 and are caused by asynchronous local ventricular repolarization.
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.
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 frontal lead system, when the average ventricular excitation potential is in the range of +60 degrees to+90 degrees, the QRS main wave of aVL lead is negative.
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.
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.

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