The Novel Low Frequency Oscillation in Pulmonary Artery Pressure
Korean Circulation Journal
;
: 714-722, 1993.
Article
in Korean
| WPRIM
| ID: wpr-66257
ABSTRACT
BACKGROUND:
It is well known that systemic blood pressure oscillates with low(0.04~0.1Hz), mid(0.1~0.15Hz), and high(respiratory) frequency range. But there has been no study about oscillation of pulmonary artery pressure(PAP).METHOD:
We measured PAP for 5 minutes in 32 patients of ventricular septal defect and stored them to computer files. Power spectral density curve was obtained. Low, mid, respiratory frequency power were measured by integrating the area within each frequency range below the power density curve.RESULT:
The incidence of significant low frequency power(more than 5% of total power) were higher in patients of high PAP and hign Rp/Rs than those of low PAP and Rp/Rs(p<0.01 and p<0.005 respectively). The low frequency power positively correlates with PAP and Rp/Rs(r=0.62, p<0.0005 and r=0.61, p=0.0005 respectively).CONCLUSION:
It can be said conclusively that as PAP and pulmonary vascular resistance elevates, the PAP tends to definitively oscillate in low frequency range.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Pulmonary Artery
/
Vascular Resistance
/
Blood Pressure
/
Incidence
/
Heart Septal Defects, Ventricular
Type of study:
Incidence study
/
Prognostic study
Limits:
Humans
Language:
Korean
Journal:
Korean Circulation Journal
Year:
1993
Type:
Article
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