12 Bilder zum Thema "action potentials" bei ClipDealer

Medien sortieren nach     Gehe zu Seite:    
« Vorherige  1  Nächste »
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.
It is best to measure the QRS wave duration in a 12 lead synchronous electrocardiogram, as some of the QRS wave start and end points are located on the isoelectric line.
The 4-phase membrane potential of sinoatrial node pacing exhibits spontaneous depolarization, while the 4-phase membrane potential of ventricular myocytes remains stable.
When the sinus P wave on the ecg disappears, it may be due to abnormal generation and/or conduction of sinus impulses, or it may be due to atrial muscle lesions that cannot excite.
When a 2:1 bundle branch block occurs, the refractory period of the bundle branch is longer than one basal cardiac cycle but shorter than two basal cardiac cycles.
Narrow QRS wave and wide QRS wave
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.
When there are more than 3 components in the QRS wave of lead V1, do not diagnose it as right bundle branch block, as this is a manifestation of fragmented QRS wave.
A 67-year-old man presents with heart palpitations, numbness of the lips and nausea after consuming poisonous shellfish. ECG showed sinus bradycardia.
On a conventional 12 lead electrocardiogram, the QRS wave of complete right bundle branch block in lead V1 is usually an rSR three-phase waveform.
Neurotransmitter interactions of cannabinol with neuron structure brain cell diagram schematic raster illustration. Medical science educational illustration
At present, the definition of narrow QRS complex is QRS durationgreater than or equal to 120ms, and wide QRS complex is defined as QRS duration beyond 120ms.

« Vorherige  1  Nächste »