Table of Content - Volume 6 Issue 2 - May 2017
Kalakonda Varsha Reddy1, Jayashankar C A2*
1Senior resident, Department of General Medicine, Gandhi Medical College And Hospital, Secunderabad 500003, Telangana, INDIA. 2Professor, Department of General Medicine, Vydehi Institute Of Medical Sciences And Research Centre, Whitefield, Bangalore 560066, Karnataka, INDIA. Email: drjayashankar.ca@gmail.com
Abstract Background: Left ventricular hypertrophy (LVH) and anemia are highly prevalent in chronic kidney disease (CKD). Anemia may potentiate the adverse effects of LVH on cardiovascular outcomes thereby increasing the risk of morbidity and mortality in chronic kidney disease patients. Objectives: To study the prevalence of anemia and left ventricular hypertrophy and their correlation in chronic kidney disease patients. Methods: The study was conducted on 100 cases of chronic kidney disease (CKD) admitted at Vydehi Institute of Medical Sciences and Research Centre, Bangalore during the year 2014. The cases were divided based on different stages of CKD (stage II-V). Out of 100 cases there were 9 cases in stage II (eGFR - 60-89mL/min/1.73m2), 17 cases in stage III(eGFR - 30-59 mL/min/1.73m2), 32 cases in stage IV(eGFR - 15-29 mL/min/1.73m2), 42 cases in stage V (eGFR <15 mL/min/1.73m2). All cases were subjected to relevant investigations which were noted and analyzed using appropriate statistical methods. Results: Out of 100 cases with chronic kidney disease, maximum patients were in 41-50 years age group with the mean age being 47.7+13.2 years. There were 69 male patients and 31 female patients showing male predominance. The prevalence of anemia in different stages of CKD were 22% in stage II, 64% in stage III, 87.2% in stage IV, 95.2% in stage V (p =0.000). The prevalence of LVH in different stages of CKD were 55.5% in stage II, 76.4% in stage III, 78.1% in stage IV, 97.6% in stage V (p=0.005). There was a significant correlation between anemia and left ventricular hypertrophy with the p value 0.000. Conclusion: In our study, both anemia and left ventricular hypertrophy are highly prevalent in chronic kidney disease (CKD) patients and we found a significant correlation between anemia and LVH in these patients. Key Words: Anemia; Chronic kidney disease; Left ventricular hypertrophy.
INTRODUCTION Left Ventricular Hypertrophy (LVH) is a frequent occurrence in patients with CKD and is an important adverse prognostic indicator.1,2 Anemia is also frequent finding in CKD patients and is an important determinant of cardiac hypertrophy which can be associated with progressive LV dilation, new-onset cardiac failure, and death.3 There are very few studies done in India which has documented an association between the severity of anemia and left ventricular hypertrophy (LVH) in CKD patients. Hence this study is undertaken to assess the prevalence of anemia, left ventricular hypertrophy and determine the correlation of anemia with left ventricular hypertrophy in CKD patients. Thus reducing the risk of further cardiac complications by treating the patients priorly.
MATERIALS AND METHODS This study was approved by the institutional ethics committee, prior to the commencement of data collection. It was a cross sectional study. 100 patients with chronic kidney disease stage 2-5 aged more than 18 years presenting to department of General Medicine and department of Nephrology at Vydehi institute of medical sciences and research centre were included in the study. This study was conducted over a period of 12 months, from January 2014 to December 2014. Patients presenting with anemia without chronic kidney disease, left ventricular hypertrophy with cause other than chronic kidney disease (like primary hypertension, aortic stenosis etc) and aged less than 18 years were excluded from the study. An informed written consent was taken from all the subjects. A pre-structured proforma is used to collect the baseline data. Detailed clinical history was taken and detailed clinical examination was done on participating individuals. Body weight was measured (to the nearest 0.5 kg) with the subject standing motionless on the weighing scale and with the weight distributed equally on each leg, without footwear. Patients were subjected to relevant investigations such as complete blood picture, blood urea, serum creatinine, peripheral blood smear, serum electrolytes, serum iron, serum ferritin, TIBC, chest x-ray, ECG and 2D-Echocardiography. The creatinine clearance was calculated for all the cases according to the Cockcroft-Gault formula.4 Creatinine Clearance (ml/min) = (140-Age) x Weight x (0.85 if female) 72 x S. Cr Anemia was defined as reduced level of haemoglobin < 12gm/dl in men and < 10 gm/dl in women. (According to Indian scenario). Echocardiography was performed using the Vingmed System Five echocardiographic system equipped with 2.5 MHz transducers, M-Mode and 2D measurements were done in accordance with methods recommended by American Society of Echocardiography. Crtieria for left ventricular hypertrophy (LVH) were considered :LVMI >131 g/m2 for males and > 110 g/m2 for females.5 Statistical Analysis: Individual case data from study subjects of CKD was transferred on a MS Excel sheet and analyzed further using standard statistical techniques. The collected data was analyzed with SPSS 16.0 version. To describe about the data descriptive statistics frequency analysis, percentage analysis were used for categorical variables and the mean and S.D were used for continuous variables. To find the significance in categorical data Chi-Square test was used. In the above statistical tool the probability value 0.05 was considered as significant.
RESULTS Demographic profile: Age and sex of participants: Out of 100 cases, 10 cases were in the range of 18-30 years, 69 cases were in the range of 31-60 years and 21 cases were above >60years. The mean age±sd of the cases in this study group was 47.73 + 13.266. In our study group out of 100 cases, 31 cases were female and 69 cases were male. Stages of CKD of participants:
Figure 1: Graphical representation of stages of CKD with number of patients
Table 1: Stages of CKD with number of patients
Maximum number of patients were in stage V
Table 2: Prevalence of anemia in different stages of CKD
81 patients had anaemia and out of them 49.4 % were in stage V.
Table 3: Prevalence of LVH in CKD
Figure 2: Graphical representation of prevalence of LVH in CKD 84 patients had LVH and out of them 48.8% were in stage V
Table 4: Anemia and LVH correlation
A+ve is anaemia present, A-ve is anaemia absent L+ is Left ventricular hypertrophy present L-ve is Left ventricular hypertrophy absent
Figure 3: Graphical representation of Anemia and LVH correlation
DISCUSSION The study was conducted in 100 participants. Their age ranged from 19 to 76 years. Of these, maximum patients were in age group 41-50 years (27%). Mean age of the patients was 47.73 + 13.266years. The prevalence of CKD varied strongly with age. The prevalence of CKD was found to be more in the male (69%) than female (31%), the mean age in male is 47years and in female is 48 years. This study is in accordance with a study in India which showed increased prevalence of CKD in middle aged patients.6 This study reveals a distinct male preponderance in study cases across all age groups. In general, the prevalence of CKD is greater in women than in men, regardless of age. Brown et al7 reported remarkably high prevalence in both men and women, but women had a tendency to have a higher prevalence of CKD than men. In our study out of 100 CKD cases, 42 were in stage V CKD, 32 were in stage IV CKD, 17 were in stage III CKD, 9 were in stage II CKD, with the percentage being 42%, 32%,17%,9% respectively. It was observed that stage V and IV had majority of cases compared to the other stages. This is due to patients presented to this hospital in late stages as patients were asymptomatic in early stages of CKD and most of patients were from rural India with minimal access to tertiary care. A study conducted by Varughese S et al8 had found the same results. The prevalence of anemia in different stages of CKD in our study was 22% in stage II (2 out of 9 cases), 64% in stage III (11 out of 17 cases),87.2% in stage IV (28 out of 32 cases) 95.2% in stage V (40 out of 42 cases). With the above mentioned data we found that anemia is more prevalent in stage III – V CKD as compared to stage II with the p value being significant i.e., p = 0.000. Mc Clellan et.al [9]studied the prevalence of anemia in different stages of CKD and found that the prevalence of anemia was strongly associated with declining glomerular filtration rate. In our study the prevalence of LVH in different stages of CKD was 55.5% in stage II (5 out of 9 cases) 76.4% in stage III (13 out of 17 cases) 78.1% in stage IV (25 out of 32 cases) 97.6% in stage V (41 out of 42 cases). With the above mentioned data LVH is found to be more prevalent in all the stages of CKD and the prevalence was increased with reduction in glomerular filtration rate. The p value for the prevalence of LVH in CKD was = 0.005 and is significant. Sambi RS et.al.[10] in their study observed a progressive rise in prevalence of LVH with the severity of kidney disease from 64% (mild/ moderate CKD group) to 96% (severe CKD group). In our study considering the correlation between anemia and LVH we found that in stage II CKD 2 cases found to be anemic and had LVH, in stage III 11 cases of anemia with had LVH, in stage IV out of 28 anemic patients 25 patients found to have LVH, in stage V 40 anemic patients had LVH and the p value <0.000 was significant. A similar correlation study was done by Datta S. et. Al3 in India found that 82% of male patients with Hb (hemoglobin)<7g/dl, 80% of male patients with Hb between 7.1-11g/dl and 68% of male patients with Hb>11g/dl had LVH. Similarly among female patients, 91% of the patients with Hb<7gm/dl, 89% of the patients with Hb between 7.1-11g/dl and 63% of the patients with Hb >11gm/dl had LVH. Thus this study concluded that with higher hemoglobin level the incidence of LVH is lesser and the severity of anemia is correlated to LVH. In the present study while correlating the anemia and LVH in CKD patients, all the anemic patients are found to have left ventricular hypertrophy. We found that stage V CKD patients has more prevalence of anemia and left ventricular hypertrophy with anemia being a co-morbid factor for further cardiovascular diseases in chronic kidney disease patients.
CONCLUSION
REFERENCES
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