Comparison between M-Mode and Doppler echocardiography in diagnosis of patent ductus arteriosus in children


Nourmohammad Noori 1 , Shahrokh Rajaei 2 , *

1 Department of Pediatrics, Zahedan University of Medical Sciences.

2 Department of Pediatrics, Hormozgan University of Medical Sciences, Bandar Abbas, Iran.

How to Cite: Noori N, Rajaei S. Comparison between M-Mode and Doppler echocardiography in diagnosis of patent ductus arteriosus in children, Hormozgan Med J. 2004 ; 8(3):e90704.


Hormozgan Medical Journal: 8 (3); e90704
Published Online: September 10, 2004
Article Type: Research Article
Received: February 29, 2004
Accepted: September 10, 2004


Introduction: Patent ductus arteriosus (PDA) is the persistence of a normal fetal
structure between left pulmonary artery and descending aorta. Persistence of this
fetal structure beyond 10 days of life is considered abnormal. In this study we
compared M-Mode and Doppler echocardiography in diagnosis of PDA in
children at Aliasghar Hospital in Zahedan and Children hospital in Bandar Abbas
for one year.
Methods: We selected 62 patients that were suspicious to have PDA on physical
examination. It should be mentioned that we omitted patients with other
congenital cardiac abnormalities such as truncus arteriosus, ASD, VSD and
AVSD. Our patients were below 15 years old. Before echocardiography, physical
examination, CXR and ECG were done for the patients. Then, they were
evaluated with both M-Mode and Doppler Echocardiography and finally results
were statistically analyzed.
Results: Out of 62 patients, 34 were female and 28 were male. 51.6% patients
were less than one year old and others were older. 85% of patients had cardiac
murmur on physical examination and in 50% of them pulmonary component of
second heart sound was increased. Peripheral pounding pulses were present in
85% of patients. In chest X-Ray, 82.3% of patients had increased cardiothoracic
ratio and pulmonary vascular markings were increased in 85.5% of them. On
ECG, 58.1% of patients had signs of right and left or bilateral ventricular
hypertrophy. Pulmonary hypertension was also seen in 51.6% of patients. PDA
was diagnosed with M-Mode echocardiography in 56 patients (90.3%) and with
Doppler echocardiography in 61 patients (98.4%). According to McNemar
statistical analysis, there was not an obvious difference between these two
methods of echocardiography in PDA diagnosis (p=0.125).
Conclusion: Findings of this study showed that M-Mode and Doppler
echocardiography for diagnosis of PDA in children are similar and again attention
to M-Mode echocardiography can be helpful in diagnosis of PDA in children
especially restless infants and neonates.



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