qrs duration造句

• However, in the two-thirds of people without prolonged QRS duration, CRT may actually be harmful.
• Most clinical studies on CCM therapy have involved heart failure patients who were classified initially as NYHA Class II, III or IV and had a normal QRS duration ( QRS duration d " 120 ms ).
• Most clinical studies on CCM therapy have involved heart failure patients who were classified initially as NYHA Class II, III or IV and had a normal QRS duration ( QRS duration d " 120 ms ).
• In people with LVEF below 35 % and prolonged QRS duration on ECG ( LBBB or QRS of 150 ms or more ) there is an improvement in symptoms and mortality when CRT is added to standard medical therapy.
• Signs of flecainide toxicity include marked prolongation of the PR interval and widening of the QRS duration on the surface ECG . There may be signs and symptoms attributable to overt heart failure secondary to sudden decreased myocardial contractility.
• CRT devices have been shown to reduce mortality and improve quality of life in patients with heart failure symptoms; a LV ejection fraction less than or equal to 35 % and QRS duration on EKG of 120 ms or greater.
• CRT treatment should be considered in lieu of CCM in patients with left bundle branch block ( LBBB ) and a QRS duration of over 120 ms, or when the QRS duration is greater than 150 ms and independent of LBBB.
• CRT treatment should be considered in lieu of CCM in patients with left bundle branch block ( LBBB ) and a QRS duration of over 120 ms, or when the QRS duration is greater than 150 ms and independent of LBBB.
• Although studies on CCM therapy have focused on patients with a normal QRS duration ( i . e . d " 120 ms ), it is possible to use CCM in patients who meet the treatment indication but who do not have a normal QRS duration.
• Although studies on CCM therapy have focused on patients with a normal QRS duration ( i . e . d " 120 ms ), it is possible to use CCM in patients who meet the treatment indication but who do not have a normal QRS duration.