ECG FeaturesAtrial fibrillation belongs to supraventricular arrhythmias. Its typical ECG performance is normal atrial wave (P wave) is replaced by f wave with irregular ventricular rhythms. f wave usually shows as a small amplitude of baseline oscillation. Its frequency usually ranges from 300 to 600 bpm, with changeable amplitude, shape and period. In comparison, the frequency of atrial flutter is 250 ~ 350 bpm, with stable shape and period.In the absence of negative conduction factors, the ventricular rate of a tpical atrial fibrillation is usually from 100 to 160 bpm. In patients with W-PW ...
Published: 2018 - 02 - 09
Definition and ClassificationStroke is a general term for acute cerebrovascular diseases, such as cerebral thrombosis, cerebral infarction or cerebral hemorrhage. It is featured with acute onset, critical condition, serious sequelae, high morbidity and mortality, becoming one of the most common causes of death.Stroke is a medical condition of blood circulation disorder, which can be divided as hemorrhagic and ischemic.Stroke refers to a series of disease related with cerebral blood circulation disorders. The clinical manifestations may include as temporary or permanent brain injury a...
Published: 2018 - 01 - 10
Definition and ClassificationPulmonary artery stenosis belongs to peripheral arterial stenosis, it can be isolated or concomitant with other heart diseasesis. It is one of the most common congenital heart disease, accounting for 8-10% of congenital heart disease. Pulmonary artery stenosis could be the only malformation, and could also be one kind of malformation of Tetralogy of Fallot or Trilogy of fallot. Tetralogy of Fallot is the most common type of cyanotic congenital heart disease with the incidence up to 10%. Pulmonary artery stenosis can be divided into 3 types, pulmonary valve stenosis...
Published: 2018 - 01 - 10
Definition and RiskValvular heart disease is a common kind of heart diseases. It refers to refers to heart valve diseases due to series of reasons, including rheumatic fever, mucus degeneration, degenerative changes, congenital malformations, ischemic necrosis, infection and trauma. The lesion could be in the mitral valve, tricuspid valve, aortic valve or pulmonary valve. The valve leaflet, chordae tendineae and papillary muscles and/or the surrounding tissues could be involved.  Those anatomical or functional abnormalities could result in single or multiple valves stenosis and/or in...
Published: 2018 - 01 - 10
The RF energy could be transferred to the clamp, and generate heat, which can cause local myocardial coagulation and necrosis, tissue degeneration. The lesions responsible for atrial fibrillation could be isolated without compromising the normal surrounding tissue. Thus, ectopic pacing triggers would be isolated and the fast ectopic impulse conduction would be blocked. By interrupting the macro-reentry, the reason for atrial fibrillation would be eliminated. Then the atrial fibrillation is cured. Surgical radiofrequency ablation is one of the best methods for persistent atrial fibrillation tre...
Published: 2018 - 01 - 10


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