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Herz mit Aufschrift Organ Donor
Equipment of hospital
Thermometer with capsule
Älterer Mann im Bademantel in einem CT
Cardiogram with stethoscope
Stethoskop auf EKG
Package pills
Thermometer isolated on white
Cardiogram with stethoscope
Cardiogram with stethoscope
Cardiogram with stethoscope
Cardiogram on paper
Cardiogram with stethoscope
Cardiogram with stethoscope
hospital modern equipment
Hospital modern equipment
Package pills
Pills
Package pills
Pills
Package pills
Package pills
Pills in bottle
Arzt Termin - Termin Kalender
Hypertonie
Human heart
Human heart
Human heart
Human heart
Untersuchung
Human heart
Woman feels pain from the heart
Blutdruckmessgeraet
Frau bei der Mammografie
ältere Ärztin in einer Praxis
Älterer Mann im Bademantel in einem CT
Exercise balls with sneakers and a water bottle
Bluthochdruck - Hypertonie
Exercise balls with sneakers and a water bottle
Woman feels pain from the heart
Blutdruckmessgeraet
Frau bei der Mammografie
junge Frau an der Mammografie
junge Frau unter dem Röntgengerät
junge Ärztin vor den Röntgenbildern eines Patienten
ältere Ärztin in einer Praxis
Älterer Mann im Bademantel in einem CT
Älterer Mann im Bademantel in einem CT
junge Ärztin an der Mammografiestation
junge Ärztin vor den Röntgenbildern eines Patienten
Cardiogram and stethoscope
Female doctor holding heart prop
Human Heart Circulation In a Skeleton
Young doctor cardiologist in telehealth concept
Human circulation cardiovascular system with heart anatomy. 3d illustration
Doctor drawing ecg heartbeat chart
Human heart beats
Cardiovascular Disease
Human Heart Blood System
Blood Heart Circulation
Men with chest pain - heart attack
Medical background
Doctor Monitoring The Heart-Rate Of Patient On A Treadmill
Heart Blood Health
A 36 year old man survived CPR after sudden syncope. The electrocardiogram was suggestive of Brugada syndrome type 1. Implantation of ICD therapy.
Human Heart anatomy
ECG and EKG Cardiovascular System
Sometimes, left ventricular hypertrophy with tall T waves is easily misdiagnosed as hyperkalemia and hyperacute T waves, and ECG needs to be carefully identified in combination with clinic.
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.
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.
Young woman doctor wearing white uniform with stethoscope checking mature patient blood pressure at meeting in hospital, serious physician gp using digital tonometer
old woman with tonometer checking blood pressure level
Heart shape in womans hands.
Heart shape in womans hands.
Heart shape in womans hands.
Heart shape in womans hands.
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.
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.
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.
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.
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.
Male, 71 years old, was clinically diagnosed with upper gastrointestinal bleeding. During sleep at night, ECG monitoring showed sinus bradycardia, blood pressure 115 and 70mmHg.
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.
The ECG characteristics of complete interatrial block are positive and negative biphasic P waves in inferior leads, and these patients are prone to atrial arrhythmia, that is, Bayes syndrome.
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.
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.
A 2:1 left bundle branch block is considered when complete left bundle branch block alternates with normal QRS complexes and the PR interval is fixed.
Male, 38 years old. There is no history of tachycardia in clinical practice. Electrocardiogram diagnosis: Sinus rhythm; Short PR interval; Early repolarization.
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.
When the heart rotates around the anteroposterior axis, the heart can only swing up and down and left and right, which affects the ECG waveform of limb leads.
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.

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