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- W2370798097 abstract "Objective To observe the value of heart rate-time curve in coronary CT angiography(CTCA) and its clinical applications.Methods Four hundred patients who would undergo CTCA were divided into 2 groups(group A and B,each n=200).In group A,scanning started at 5 s after breath-hold.In group B,scanning began at the best heart rate after breath-hold,based on heart rate-time curve during training.Heart rate variations with time after breath-hold were divided into 4 types: Decreased-type,stable-type,increased type,increased and then decreased type.The curves distribution of patients in training and scanning in group B were statistically analyzed and compared,as well as the heart rate and the heart rate fluctuations during scanning in group A and B.The imaging quality of CTCA in groups A and B were evaluated and compared.Results In group B,no statistical difference of the distribution of heart rate-time curves between training and scanning was found(χ2=0.751,P0.05).Heart rates in group B were lower than that in group A(t=3.523,P0.01).Heart rate fluctuations were significantly less in group B than in group A(t=4.417,P0.01).For good and excellent rates of CTCA imaging quality,group A was 82.08%(2134/2600),group B was 88.19%(2293/2600)(χ2=3.82,P0.01).Conclusion Heart rate-time curve in training could be used to optimize the scanning.The use of heart rate-time curve is effective in controlling heart rate during scanning,reducing the heart rate fluctuations and improving the imaging quality of CTCA." @default.
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- W2370798097 date "2011-01-01" @default.
- W2370798097 modified "2023-09-23" @default.
- W2370798097 title "Value of heart rate-time curve in 64-slice CT coronary angiography" @default.
- W2370798097 hasPublicationYear "2011" @default.
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