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In acute high lateral myocardial infarction, there is indicative ST segment elevation in leads I and aVL, and corresponding ST segment depression in leads II, III and aVF.
Electromechanical separation is a kind of terminal ECG. The patient's ECG has electrical signals, the ECG wave is widened with morphological abnormalities, and the ventricle has no contraction.
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.
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.
Bidirectional ventricular tachycardia is a kind of malignant arrhythmia. The polarity of QRS main wave alternates from beat to beat, and it is easy to degenerate into ventricular fibrillation.
A 36 year old man survived CPR after sudden syncope. The electrocardiogram was suggestive of Brugada syndrome type 1. Implantation of ICD therapy.
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.
Torsade de pointes refers to the pleomorphic ventricular tachycardia that occurs in the background of long QT interval, and the polarity of QRS wave twists around the equipotential line.
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.
Sometimes, because the QRS axis is in the upper left quadrant, the high-amplitude R wave of left ventricular hypertrophy occurs in the limb leads, and left chest leads is normal.
A patient with acute extensive anterior myocardial infarction developed ventricular tachycardia during hospitalization and quickly experienced cardiac arrest.
Note that the V3 lead of this ECG shows that the amplitude of R wave is greater than the amplitude of S wave, and there is counterclockwise rotation.
Generally, when the sinus heart rate is below 60 beats per minute, it is called sinus bradycardia. This arrhythmia can be both physiological and often pathological.
Male, 60 years old, clinically diagnosed as acute extensive anterior wall myocardial infarction. The patient died of ventricular fibrillation after admission.
Male, 60 years old, clinically diagnosed as acute extensive anterior wall myocardial infarction. The patient died of ventricular fibrillation after admission.
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.
During the onset of variant angina pectoris, ECG is divided into non fusion wave, partial fusion wave and complete fusion wave according to the fusion degree of QRS wave, ST segment and T wave.
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.
Female, 51 years old, diagnosed with mitral stenosis. When this ECG was taken, the patient still maintained sinus rhythm.Note that the P wave duration was widened.
Ventricular tachyarrhythmia includes many clinical types, some benign and some malignant. For malignant ventricular arrhythmias, patients are at risk of death.
A 14-year-old leukemic child had a sudden wide QRS tachycardia with a frequency of 167 bpm, and the rhythm was regular. After anti-arrhythmia treatment, the patient recovered to sinus rhythm.
At present, there is a younger trend in patients with acute myocardial infarction, so it is important to check the ECG for acute chest pain in young people.
In case of acute anterior myocardial infarction, the characteristics of ST segment elevation in ECG can be used to deduce whether the culprit vessel system is the left main trunk or the proximal LAD.
Coronary artery spasm causes transmural myocardial ischemia, and ST segment elevation in ECG has localization characteristics. Criminal vessels can be derived from ST segment elevation leads in ECG.
In complete left bundle branch block, the conduction of the LBB can be completely interrupted or can still be conducted, but it is delayed by at least 45ms than the RBB.
The left main coronary artery can be divided into the left anterior descending artery and the left circumflex artery, and sometimes the intermediate branch artery.
Atrial focal originating in the left upper pulmonary vein, with an upright P wave in V1 and wide duration, inverted P wave in lead aVL and an upright P wave with notch in inferior leads.
When ectopic impulses from the anterior wall of the right atrium produce a completely negative P wave in lead V1, the posterior wall ectopic impulse produces a positive and negative biphasic P wave.
The PR interval is age-related, and the PR interval should be assessed for abnormalities based on the age of the person being examined.
Male, 84 years old, admitted to hospital with chest pain for 1 day. ECG showed acute inferior and posterior MI and possibly right MI. The patient died of ventricular fibrillation the next day.
The standard for diagnosing right atrial abnormality in ECG is that the amplitude of P-wave in limb leadsI is greater than 2.5mm, and the amplitude of upright P-wave in chest leads is 1.5mm.
Third degree atrioventricular block in young women may be congenital, with the block located on the atrioventricular node or above bifurcation of the His bundle.
The typical ST-T changing of left ventricular hypertrophy are: ST segment slightly convex with downward sloping depression; fusion of ST segment and inverted T wave; asymmetry of inverted T wave.
Male, 65 years old, was clinically diagnosed with acute anterior myocardial infarction. The patient was treated with a coronary stent, but no reperfusion T wave occurred on day 2.
A patient with AIMI presents with a sudden widening of the QRS complex in the junctional escape rhythm, premature ventricular contractions, resulting in polymorphic ventricular tachycardia.
The effective refractory period of the ventricular muscle is equivalent to the time from the onset of QRS to the peak of the T wave on the ECG.
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 the rhythm of the atria originates in the lower part of the atria, the whole atria are excited from inferior to superior, producing negative P waves in the inferior leads.
Male, 84 years old, admitted to hospital with chest pain for 1 day. These ECG rhythms are the Holter monitor records of the patients after admission, and they are third degree atrioventricular block.
Third degree atrioventricular block in young women may be congenital, with the block located on the atrioventricular node or above bifurcation of the His bundle.
In acute left main occlusion, the left ventricular myocardium is massively ischemic and necrotic, the excitatory potential of the left ventricle is weakened, and the axis may deviate to the right .
Male, 65 years old, was clinically diagnosed with acute anterior myocardial infarction. The patient was treated with a coronary stent, but no reperfusion T wave occurred on day 2.
Because of the slow conduction of atrioventricular node, the PR interval of adult ECG should be greater than 120ms. This physiological phenomenon is called atrioventricular delay.
A patient with AIMI presents with a sudden widening of the QRS complex in the junctional escape rhythm, premature ventricular contractions, resulting in polymorphic ventricular tachycardia.
The PR interval of an ecg includes the time during which supraventricular impulses are transmitted through the atrioventricular node, His bundle, bundle branches, and terminal Purkinje fibers.
Four anatomical malformations of tetralogy of Fallot: 1 aortic straddling; 2 ventricular septal defect; 3 right ventricular hypertrophy and 4 pulmonary artery stenosis.
In imaging medicine, the left ventricle can be divided into 17 segments, which are mainly divided into three parts: the basal, the mid-cavity and the apical.
Third degree atrioventricular block in young women may be congenital, with the block located on the atrioventricular node or above bifurcation of the His bundle.
During nocturnal sleep, vagus tone is elevated, and ECG may show both sinus bradycardia and first-degree atrioventricular block.
Mechanical Ventilation waves. Volume, flow and pressure curves from a mechanical Ventilator.

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