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Biomedical subjects

K K Dwivedi

Publications and source records attributed to K K Dwivedi.

18 recordsLinked to original sources
PubMed2004

An extensive indoor 222Rn/220Rn monitoring in Shillong, India.

The behaviour of ubiquitous radon (222Rn), thoron (220Rn) and their progeny in the indoor atmosphere generally reflects a complex interplay between a number of processes, the most important of which are radioactive alpha-decay, ventilation, attachment to aerosols and deposition on surfaces. The present work involved a long-term (1997-2000) passive monitoring of 222Rn and 220Rn in the indoor environment of Shillong, Meghalaya. The north-east region of India being a zone of high seismicity, the indoor radon and thoron map of the region will provide a better insight and a valuable database for any study related to radon and thoron anomalies.

Air Pollutants, Radioactive↗
PubMed1996

Complications of treadmill testing.

Complications occurring in 2,400 treadmill tests are reported, out of which 2107 (87.8%) were on males and 292 (12.2%) on females. The total number of patients with complications was 29 (1.2%) and the types were: acute MI in 2, ventricular tachycardia (sustained) in 3, nonsustained in 7 with ventricular couplets in 3 patients, atrial tachyarrhythmias in four of AVNRT in 2, EAT in 2, SVT with abberancy in 1, SVT (undifferentiated) in 3, bradyarrhythmias in form of sinus bradycardia in 4, hypotension in 4 and AV block in 2. There were no deaths. Only 8 (0.33%) patients required treatment-2 each of acute MI, sustained VT, AVNRT and hypotension, though only 4 of them were hospitalised (2 each of acute MI and VT) and subsequently discharged. Highest incidence of complications was seen in post MI patients (2.01%) followed by those with typical anginal pain (1.9%) and they had more serious problems in form of MI and sustained VT. 55.17% patients with complications were positive for provocative ischaemia as compared to 22.75% positivity in the total. Although 14 (38.2%) patients developed complications at workload of 4-6 METS but 2 achieved load of 10 METS also. Complications were seen mostly during exercise and also during recovery only.

Arrhythmias, Cardiac↗
PubMed1993

Plasma lipoproteins in cortical and lacunar infarction.

Plasma lipoproteins in 30 patients of cortical infarction and 20 patients of lacunar infarction were estimated to study the relation of plasma lipids to the risk for ischaemic stroke by comparing clinical and biochemical characteristics of survivors. No significant differences were observed in the concentrations of total cholesterol, triglycerides, low density lipoproteins, very low density lipoproteins in both the groups. However patients with lacunar infarction had higher concentrations of high density lipoproteins as compared to patients with cortical infarction. These data suggest that previously demonstrated differences in HDL concentration between patients with ischaemic stroke and control subjects without stroke may be true for patients with cortical infarction but not for patients of lacunar infarction.

Adult↗
PubMed1992

A study of aluminium phosphide poisoning with special reference to its spot diagnosis by silver nitrate test.

A total of 45 cases of Aluminium phosphide poisoning were studied from December 1989 to November 1990. Silver nitrate (AgNO3) test was positive in gastric aspirate in all cases (100%) who took fresh tablets and negative in those who took exposed tablets. The test was also positive in breath but had a lower sensitivity. Majority of patients revealed ECG abnormalities.

Aluminum Compounds↗
PubMed1980

Trace elemental analysis of extracted dust from lungs and lymph nodes of domestic animals using X-ray fluorescence technique.

Samples of dust extracted from the lungs and lymph nodes of certain domestic animals from West Bengal, Orissa, Bihar provinces of India were quantitatively analysed using photon excited energy dispersive X-ray fluorescence technique. Thin specimens were prepared for analysis to minimize matrix enhancement and absorption effects. Amongst the various elements analysed, Hg, Fe, Cu, Zn and Pb were found to be present in appreciable amounts. An important finding was the presence of a very high concentration of Hg in extracted dust samples from West Bengal. The significance of the various results obtained in this investigation is discussed.

Animals↗