Mejoría de la función muscular inspiratoria en pacientes con estenosis mitral cerrada después de valvuloplastia mitral percutánea: comunicación preliminar / Improvement in inspiratory muscle function after percutaneous mitral valvuloplasty in mitral stenosis: preliminary report
Rev. méd. Chile
; 128(5): 467-74, mayo 2000. tab, graf
Article
in Spanish
| LILACS
| ID: lil-267656
Responsible library:
CL1.1
ABSTRACT
Background:
It has been proved that there is an inspiratory muscle dysfunction in mitral stenosis; Although its causes still remain unknown.Aim:
to evaluate the effect of percutaneous balloon mitral valvuloplasty (PMV) on inspiratory muscle performance (IMP) in patients with mitral stenosis (mitral area < 1.5 cm2). Patients andmethods:
We studied IMP in 8 patients (35 ñ 10 years) before and 3 months after successful PMV. Inspiratory muscle strength was studied by measuring maximal statistical inspiratory mouth pressure (MIP). Endurance was evaluated using a two minute incremental threshold loading test in order to obtain the maximal sustainable inspiratory pressure (SIP), with the maximal sustainable load (MSL) the patients could sustain for 2 minutes.Results:
Mitral valvuloplasty increased mean cardiac index from 3.1 ñ 0.3 to 4.15 ñ 0.3 l/min/m2 (p<0.01), and significantly decreased mean pulmonary and capillary pressures. The MIP value(118 ñ 6 cmH2O), similar to that of normal group, increased to 137 ñ 7 cmH2O (p<0.01). SIP and maximal sustainable load were 52 ñ 3 cmH2O and 294 ñ 29 g respectively, lower than normal subjects (p<0.05) They increased after PMV to 80 ñ 3 cmH2O and 463 ñ 26 g respectively (p<0.001).Conclusions:
PMV improved inspiratory muscle function in patients with severe mitral stenosis, probably secondary to a decrease work of breath and improvement of ventricular function
Full text:
Available
Collection:
International databases
Database:
LILACS
Main subject:
Respiratory Physiological Phenomena
/
Catheterization
/
Mitral Valve Stenosis
Limits:
Adult
/
Female
/
Humans
/
Male
Language:
Spanish
Journal:
Rev. méd. Chile
Journal subject:
Medicine
Year:
2000
Document type:
Article
/
Project document