Clinical Presentation of Heart Failure Patients Admitted in National Institute of Cardiovascular Diseases , Dhaka

Background: Heart failure is a complex clinical syndrome that arises secondary to abnormalities of cardiac structure and/or function (inherited or acquired) that impair the ability of the left ventricle to fill or eject blood. The worldwide prevalence and incidence rates of heart failure (HF) are approaching epidemic proportions, as evidenced by the relentless increase in the number of HF hospitalizations, the growing number of HF-attributable deaths, and the spiraling costs associated with the care of HF patients. Worldwide, HF affects nearly 23 million people. In the United States, HF affects approximately 4.7 million persons (1.5 to 2 percent of the total population), with approximately 550,000 incident cases of HF diagnosed annually. Heart failure patients have various presentations and different etiologies. So, this study aimed to see the different clinical presentations of hospitalized heart failure patients. Methods: This study was done to see Clinical Presentation of Heart Failure Patients admitted in National Institute of Cardiovascular Diseases, Dhaka. Total 2112 patients were enrolled for this study during the period of August 2006 to July 2011. Results: Most of the patients (65%) were of 51-70 years age group. 75% (1584) patients were male. 98% patients presented with SOB, 95% patients had basal crepitation, 74% had orthopnoea, 59% had Paroxysmal Nocturnal Dyspoea (PND), 40% had leg edema and 25% had raised JVP. Average heart rate was 85 beats/min, average systolic B.P. was 118 mm Hg and average diastolic B.P. was 73 mm Hg. 45% population had hypertension, 29% patients had diabetes and 27% had concomitant respiratory illness. Average EF was 38%. Ischemic Cardiomyopathy was the commonest (39%) cause of heart failure, acute coronary syndrome was the second leading (29%) cause and valvular heart disease is the third common cause. Conclusion: Most of the heart failure patients are elderly age group. Most of the patients presented with shortness of breath and bilateral basal creps. Most patients had co-morbid other illness that influences the natural course of heart failure patients. Most common causes are ischemic cardiomyopathy, a sequel of ischemic insult of the heart. So, patients of acute or chronic ischemic heart diseases should be treated and follow up with care, considering their socioeconomic condition also.


Introduction:
Bangladesh is passing through an epidemiological transition.Burden of infectious diseases are coming down while with increased life expectancy and wide spread change of lifestyle, non-communicable diseases are on the rise. 1 Cardiovascular diseases are one of the main causes of morbidity and mortality in this country now.Heart failure (HF) is a significant and growing health problem as the population ages.Despite improvements in therapy, mortality and morbidity remain high. 1,2art failure is a complex clinical syndrome that arises secondary to abnormalities of cardiac structure and/or function (inherited or acquired) that impair the ability of the left ventricle to fill or eject blood. 1 The worldwide prevalence and incidence rates of heart failure are approaching epidemic proportions, as evidenced by the relentless increase in the number of heart failure attributable death, and the spiraling costs associated with the care of heart failure patients.Worldwide, heart failure affects approximately 23 million people.In the United States, heart failure affects approximately 4.7 million persons (1.5 to 2 percent of the total population), with nearly 550000 incident cases of heart failure diagnosed annually. 1,2timates of the prevalence of symptomatic heart failure in the general European population are similar to those in the  United States and range from 0.4 to 2 percent.The prevalence of heart failure follows an exponential pattern, rising with age, and affects 6 to 10 percent of people older than 65 years.The overall prevalence of heart failure is thought to be increasing, in part because our current therapies of cardiac disorders, such as myocardial infarction, valvular heart disease, and arrhythmias, are allowing patients to survive longer. 2 Many of the typical signs and symptoms of heart failure are not directly attributable to the cardiac abnormalities that occur in the failing heart, but rather arise secondarily to abnormalities that occur in remote organs (e.g., kidney) or tissues (e.g., skeletal muscle).The dysfunction that occurs in these organs and tissues cannot be explained solely by decreased perfusion pressure, suggesting that other systemic processes (e.g., neurohormonal activation) must contribute to the syndrome of heart failure.Although heart failure was once thought to arise primarily in the setting of depressed left ventricular (LV) ejection fraction (EF), epidemiological studies have shown that approximately 50 percent of patients who develop heart failure have a normal or preserved EF.Epidemiological studies have also shown that patients may have significant abnormalities of LV contraction and relaxation and yet have no symptoms, in which case these patients are referred to as having asymptomatic heart failure.When a patient with chronic heart failure deteriorates, the patient is referred to as having decompensated or, alternatively, acute decompensated heart failure if the symptoms arise abruptly.Congestive heart failure is largely an outdated term that reflects the original clinical observation that patients with heart failure were frequently edematous or volume-overloaded.However, with current medical and device therapy, most patients with heart failure remain euvolemic, and are therefore referred to simply as having heart failure. 2,3,4 western developed countries, coronary artery disease, either alone or in combination with hypertension, seems to be the most common cause of heart failure.It is, however, very difficult to be certain what is the primary etiology of heart failure in a patient with multiple potential causes (for example, coronary artery disease, hypertension, diabetes mellitus, Atrial fibrillation, etc).Furthermore, even the absence of overt hypertension in a patient presenting with heart failure does not rule out an important etiological role in the past, with normalisation of blood pressure as the patient develops pump failure.The initial cohort of the Framingham heart study was monitored until 1965; hypertension appeared to be the most common cause of heart failure, being identified as the primary cause in 30% of men and 20% of women and a cofactor in a further 33% and 25%, respectively.Moreover, electrocardiographic evidence of left ventricular hypertrophy in the presence of hypertension carried an approximate 15 fold increased risk of developing heart failure.In the subsequent years of follow up, however, coronary heart disease became increasingly prevalent before the development of heart failure and, as the identified cause of new cases of heart failure, increased from 22% in the 1950s to almost 70% in the 1970s.w11During this period, the relative contribution of hypertension and valvular heart disease declined dramatically. 5,6ere was an approximate 5% and 30% decline in the prevalence per decade of hypertension during this period among men and women, respectively.The declining contribution of hypertension most probably reflects the introduction of antihypertensive treatment; the parallel decline in the prevalence of left ventricular hypertrophy supports this supposition.[9] Framingham data has to consider the fact that heart failure was identified on clinical criteria alone and undoubtedly included individuals without associated left ventricular systolic dysfunction.

Methods:
The study population was the patients admitted in hospital with features of heart failure.Diagnostic criteria for diagnosis of congestive heart failure are paroxysmal nocturnal dyspnoea, orthopnea, exertional dyspnoea, elevated JVP, pulmonary basal crepitation, third heart sound, peripheral edema, night cough, hepatomegaly, pleural effusion, cardiomegaly on CXR, pulmonary edema on CXR, and echocardiographic findings.
Total 2112 patients were enrolled for the study during the period of August 2006 to July 2011.
Ethical approval for this study was granted by the ethics committee.A cardiologist took a standardized medical history and examined all the patients after hospital admission and the clinical findings of the admitting doctors were noted.Whenever possible an electrocardiogram, chest radiograph, transthoracic echocardiogram, serum biochemistry and haematology and thyroid function tests were performed.The echocardiogram was done to a standard protocol and according to accepted guidelines by a cardiologist and the two-dimensional, M-mode, Doppler and Colour-flow images were recorded.In SOLVD clinical trial, 12 mean age was 61 years.In DIG study (1997), 13 RALES study, 14 MERIT-HF study, 15 ATLAS Study 16 mean age was 64 years.M Kabiruzzaman et al 22 showed mean age was 54 years.

Results:
The Hillingdon heart failure study evaluated the incidence and aetiology of heart failure in one district of west London, England using clinical and echocardiographic data and a case definition based on three cardiologists applying the ESC definition of heart failure .The median age at the time of diagnosis of heart failure was 76 years.The incidence of heart failure was significantly higher in men than women at all ages with an age-standardised ratio of 1.75.The primary aetiologies were coronary heart disease (36%), unknown (34%), hypertension (14%), valve disease (7%), atrial fibrillation alone (5%), and other (5%). 8murray et al 9 studied trends in hospitalization for heart failure in Scotland 1980-1990.They found seventy-eight percent of discharges were in persons aged > 65years and 48% of discharges were male.
In our study, Male was 75% and Female was 25%.In SOLVED clinical trial, male was 80% and female was 20%.In DIG study 13 and MERIT-HF 15 male was 78%.
In our study, 69.42% diagnosed as Ischemic Heart Disease (Acute Coronary Syndrome 29.37%; Ischemic Cardiomyopathy 38.03% and Chronic Ischemic Heart Disease 2.02%.In SOLVD 12 clinical trial 71% had ischemic cause of heart failure, in DIG 13 study 70% had ischemic cause of heart failure, in MERIT-HF 15 66% had ischemic cause of heart failure.In ATLAS 16 study, 64% had ischemic cause of heart failure.In RALES study, 14 54% had ischemic cause of heart failure. 08.39% patients had hypertensive heart failure, In DIG 13 (1997) study, 09% had hypertensive heart failure and in ATLAS 16 study , 20% had hypertensive heart failure.
In the present study, 15.29% had valvular cause of heart failure.In ATLAS study, 06% had valvular cause of heart failure.In SPICE registry, 17 05% had valvular cause of heart failure.
In our study, 04.12% was diagnosed as DCM (Dilated Cardiomyopathy) as a cause of heart failure.In SOLVD (1991) clinical trial 18% had DCM, in DIG study 15% had DCM as a cause of heart failure, in SOLVD 18 registry 13% had DCM.In ATLAS study, 28% had DCM as a cause of heart failure.In SPICE 17 registry, 17% had DCM.
In Pakistan, Jafary et al studied 196 patients with mean age 61.2 ± 12.8 years with a high preponderance of males.All of them were suffering from systolic heart failure with LVEF d" 40%, requiring hospital admission with more than 60% suffering from hypertension (67.3%) and diabetes mellitus (60.7%) and more than three-fourths havinga history of coronary artery disease in the past. 23 the United Kingdom, most patients admitted to hospital with heart failure are more than 65 years old.The prevalence of heart failure rises from around 1% in the age group 50-59 years to between 5 and 10% of those aged 80-89 years.Heart failure is frequently due to coronary artery disease. 24ow et al 25

Conclusion:
Despite a decline in age adjusted mortality from coronary heart disease (CHD) in developed countries overall, the number of patients with chronic CHD is increasing.This is principally the result of two separate trends.Firstly, the proportion of elderly in the population is increasing rapidly and these subjects have the highest incidence of CHD and hypertension.Secondly, survival in those with coronary artery disease is improving.In particular, it has been shown that survival after acute myocardial infarction has increased notably over the past decade, at least in part because of better medical treatment.As coronary artery disease is the most powerful risk factor for heart failure it is likely that the aforementioned trends will lead to an increase its future prevalence.]26 In our study, most of the heart failure patients are elderly age group.Most common cause is ischemic cardiomyopathy, a sequel of ischemic insult of the heart.So, patients of acute and chronic ischemic heart disease patients should be treated and follow up with care, considering their socioeconomic condition also.NSAIDs, Steroids, and other fluid retaining drugs should be used cautiously in cardiac patients prone to develop heart failure.
The number of patients with heart failure is bound to rise at the premature age if appropriate measurement is not taken to manage risk factors and to increase public awareness.Clinical and Epidemiological study is needed to explore further details.

Table - I
Baseline Characteristics of study population N=2112.

Table - IV
Causes of Heart Failure of study population N=2112.
Discussion:Total 2112 patients of heart failure were enrolled.Patients are of 14 to 87 years age range.Average age was 46 ± 07 years.Most of the patients (75%) in 51-70 years age groups.