Prognostic Value of Diastolic Dysfunction Derived From D-SPECT in Coronary Artery Disease Patients With Normal Ejection Fraction

Diastolic dysfunction (DD) with normal systolic function has been elucidated to be associated with heart failure and worse prognosis. The recently introduced single photon emission computed tomography (SPECT) with dedicated cardiac cadmium-zinc-telluride (CZT) cameras (D-SPECT) is a novel method to quantitate left ventricular functional parameters. We aimed to evaluate the prognostic value of DD derived from D-SPECT in coronary artery disease (CAD) patients with normal ejection fraction. All CAD patients who underwent D-SPECT and invasive coronary angiography within 3 months were considered. DD was defined as peak filling rate (PFR) <2.1 end diastolic volume (EDV, ml)/s according to the D-SPECT results. Patients were divided into three groups: group 1 (n = 226)—normal PFR; group 2 (n = 67)—ischemia-related DD (abnormal stress PFR and normal rest PFR); and group 3 (n = 106)—rest DD (abnormal rest PFR). The primary clinical endpoint of the present study was a composite of heart failure events (HFE). A total of 399 consecutive CAD patients with normal systolic function undergoing stress D-SPECT were analyzed. The incidence rates of HFE among the three groups were 4.0, 7.5, and 11.3%, respectively. Cox regression analysis showed that the multivariate predictors of HFE were rest PFR, diabetes mellitus, obesity, and old age. DD derived from D-SPECT in CAD patients with normal ejection fraction is predictive of HFE.

Baseline intra-operative left ventricular diastolic function predicts postoperative length of stay in patients with normal systolic function undergoing isolated coronary artery bypass surgery

Importance: Abnormal left ventricular (LV) diastolic function, with or without a diagnosis of heart failure, is a common finding that can be easily diagnosed by intra-operative transesophageal echocardiography (TEE). The association of diastolic function with duration of hospital stay after coronary artery bypass (CAB) is unknown. Objective: To determine if abnormal LV diastolic function (diastolic dysfunction) is associated with length of hospital stay after coronary artery bypass surgery (CAB). Design: Prospective observational studySetting: A single tertiary academic medical centerParticipants: Patients with normal systolic function undergoing isolated CAB from September 2017 through June 2018. Exposures: LV function during diastole, as assessed by intra-operative TEE prior to coronary revascularization. Main Outcomes and Measures: The primary outcome was duration of postoperative hospital stay. Secondary intermediate outcomes included common postoperative cardiac, respiratory, and renal complications. Results: The study included 176 participants (mean age 65.2 +/- 9.2 years, 73% male); 106 (60.2%) had LV diastolic dysfunction. Median time to hospital discharge was significantly longer for subjects with diastolic dysfunction (9.1/IQR 6.6-13.5 days) than those with normal LV diastolic function (6.5/IAR 5.3-9.7days) (P< 0.001). The probability of hospital discharge was 34% lower (HR 0.66/95% CI 0.47-0.93) for subjects with diastole dysfunction, independent of potential confounders, including a baseline diagnosis of heart failure. There was a dose-response relation between severity of diastolic dysfunction and probability of discharge. LV diastolic dysfunction was also associated with postoperative cardio-respiratory complications; however, these complications did not fully account for the relation between LV diastolic dysfunction and prolonged length of hospital stay.Conclusions and Relevance: In patients with normal systolic function undergoing CAB, diastolic dysfunction is associated with prolonged duration of postoperative hospital stay. This association cannot be explained by baseline comorbidities or common post-operative complications.

P1602 An adult with mitochondrial cardiomyopathy

Introduction Mitochondrial diseases are a group of rare inherited disorders with diverse phenotypes that are caused by mutation in nuclear or mitochondrial DNA. The prevalence of mitochondrial disease is estimated to be one in 5000 livebirths. The heart depends mainly on the energy produced through aerobic respiration and hence cardiac involvement is common, progressive and its presence is an independent predictor of mortality in patients with mitochondrial disease and may occur as the principal clinical manifestation or part of a multisystem disease. Case report We present a 31 years old lady who was referred to our hospital with a newly diagnosed hypertension and non-specific ECG changes. The patient had no shortness of breath, no palpitation and no chest pain. She was overweight and had short stature. Her blood pressure was elevated 155/90. There was no signs of heart failure and no murmurs on auscultation of the heart and lung. Her ECG showed sinus bradycardia 55-60 b/min, ST segment elevation in the anterior chest leads with non-specific widespread t wave inversion. An Echocardiogram was done and showed concentric left ventricular hypertrophy (LVH) at 1.5 cm with speckling and granite-like appearance of the myocardium with no LV out flow tract (LVOT) obstruction and with normal systolic function and no significant valvular disease. A cardiac MRI was done and showed mildly dilated LV with normal geometry, normal systolic function, concentric LV hypertrophy with papillary muscles hypertrophy, relative sparing of the apical segments and with no LVOT flow acceleration and no late gadolinium enhancement. Our patient had mild hearing loss which is maternally inherited with her mother and her maternal uncle had cochlear implants. She also had borderline diabetes mellitus and she was also found to have the m.3243 &gt; G mutation suggesting a mitochondrial disorder . A diagnosis of mitochondrial cardiomyopathy was made and the patient was started on an antihypertensive and planned to have regular cardiology clinic follow up. Conclusion Hypertrophic remodelling is the dominant pattern of cardiomyopathy in all forms of mitochondrial disease; occurring in up to 40% of patients and its presence is associated with higher mortality. The severity can vary from asymptomatic as in our patient to severe heart failure with acute decompensation that can occur with metabolic disorders or general illnesses. Treatment of mitochondrial disorders is mainly symptomatic with no curative therapy available. We aimed at increasing awareness of this rare disease. Abstract P1602 Figure.

498 A missed and misdiagnosed case of pericardial agenesis

Introduction Pericardium is a fibroserous sac surrounding the heart and the roots of the great vessels. Pericardial agenesis which is a rare condition can be complete or partial and the most common form is absence of left hemipericardium. Pericardial agenesis is often an incidental finding, as it is usually asymptomatic. Moreover patients presenting with symptoms can be missed diagnosed, because it can be difficult to visualise the pericardium clearly with imaging modalities. Herein we present a misdiagnosed pericardial agenesis case. Case Report A 49 years old male was admit to our cardiology clinic for confirmation, and follow-up of a previous diagnosis of right ventricular cardiomyopathy (CMP). He had been previously diagnosed based on transthoracic and transesophageal echocardiography findings 13 years ago. Since then he had been attending routine follow-ups, he had also underwent several imagining modalities even cardiac magnetic resonance (CMR) to confirm the diagnosis of right ventricular CMP. No arrhythmia had been detected in Holter monitoring. He had no dyspnea, or other specific signs and symptoms. His medical and family histories were otherwise unremarkable. A 12-lead electrocardiogram (ECG) showed normal sinus rhythm without having specific abnormalities. The chest X-ray revealed laevorotation of the heart (Fig A). The transthoracic echocardiography showed a laterally displaced left ventricle (LV) apex, and an enlarged right ventricle (RV) with normal systolic function (Fig B). Coronary computed tomography angiography (CCTA) revealed normal coronary arteries, leftward displacement of the heart with mild RV dilatation. The pericardium was only visible around right atrium (Fig C). CMR demonstrated mild RV dilatation (end-diastolic volume 167ml) with reasonable systolic function (EF 50%), normal LV dimensions with normal systolic function (Fig D). The absence of pericardium at both left and right sides, except around right atrium, was confirmed, whereas there was no additional finding such as wall motion abnormality. Therefore the patient was diagnosed with partial pericardial agenesis and scheduled for follow-ups. Conclusion The pericardial agenesis which is a rare disorder is generally benign. Although MRI is believed to be the gold standard technique, it might not be able to delineate entire pericardium, because of various artefacts or paucity of surrounding fat. Therefore physicians should be aware of the indirect signs on various imaging modalities like excessive laevorotation of the heart, as direct recognition can be tricky, and the patient can be easily missed and/or misdiagnosed. Our patient was asymptomatic. His pericardial defect was almost total and this abnormality hadn’t been recognized in his previous CMR or echocardiograpy, leading to a misdiagnosis of CMP. Complete or unilateral absence of the pericardium is considered to be benign, surgical pericardioplasty may only be considered for highly symptomatic patients. Abstract 498 Figure.

Echocardiographic assessment of Left Ventricular Dyssynchrony in Hypertensive Patients with Normal Systolic Function

Background: Normal Left Ventricular systolic function is present in nearly 50% of patients with congestive heart failure, the majority of such patients have systemic hypertension. Recent studies have demonstrated Left Ventricular dyssynchrony among patients with heart failure and normal systolic function. The co-existence between Left Ventricular dyssynchrony and hypertension with normal systolic function (with no clinical evidence of heart failure) is less well understood. Objective: To assess the Left Ventricular dyssynchrony among hypertensive patients with normal systolic function by using Tissue doppler imaging.To find out the associations between the LV dyssynchrony and other global echocardiographic findings like (LA volume index, LVmassindex , LV sephericity and LV filling pressure E/E`) Type of the study: Prospective case- control study Methods: The study conducted in Baghdad Teaching Hospital from 1st of June 2015 to 30th of May 2016 .Study included two groups of people, 40 patients, age_ matched healthy (control) group (group1) and 60 patients with established hypertension (group 2). A Complete 2-D and TDI echocardiography studies with simultaneous ECG were performed for all patients. Examination involved LV septal and posterior wall thicknesses, internal dimensions, left atrial size, ejection fraction and tissue doppler derived waves velocities E', E/E.' Dyssynchrony was determined by measuring T-P max ( the maximal time difference from the onset of QRS to peak systolic velocity on TDI between any opposing LV wall in 3 apical views) . Results: The study included 40 age –matched control people, 27males (67.5%) and 13 females (32.5%) with a male to female ratio was 1.8 :1, ranging from (42.4-58y) with mean age was (50.2 ±7.8y ) (group 1) and 60 hypertensive patients, 38 males (63.3%) and 22 females (36.7%) with a male to female ratio was 1.7 :1, ranging from (48.5- 66.5y) with mean age of (57.5± 9.0 y) (group 2) . Left Ventricular dyssynchrony was identified in 20 of 60 patients (33.3%) .Dyssynchrony had no significant association with age and BSA. But it was significantly associated with LA volume index (r = 0.61, p=0.001), LV mass index(r=0.52 ,p=0.001) , LV sphericity index (r= 0.5, p = 0.003) ) and LV filling pressure(r=0.6 , p value=0.001) . Dyssynchrony had significant negative correlation with ( E`) velocity (r= - 0.7 ,P =0.001) . Conclusion: Left Ventricular dyssynchrony is frequent among hypertensive patients with normal LV systolic function .The Left Ventricular dyssynchrony is significantly related to LA volume, LV mass, LV sphericity and LV filling pressure.

Echocardiographic evaluation of diastolic dysfunction in type 2 diabetes mellitus with normal systolic function and correlation with duration of diabetes mellitus and HbA1C

Background: The incidence of heart failure in diabetic subjects is high even in absence of hypertension and coronary artery disease. Studies have reported a high prevalence of preclinical diastolic dysfunction among subjects with diabetes mellitus. The aim of this study was to assess relationship of diastolic dysfunction with duration of diabetes mellitus and HbA1c level.Methods: This cross-sectional observational study was conducted in 200 consenting patients with diabetes mellitus without history of hypertension and established coronary artery disease with normal systolic function from the period of February 2013 to October 2014. All diabetic patients were studied for HbA1c level, time period since 1st diabetes was diagnosed, and echocardiography was performed and, diastolic function parameters were measured.Results: In this study, out of 32 subjects with HbA1c 7.1-8.0%, 25 (78.12%); out of 80 subjects with HbA1c 8.1-10.0%, 69 (86.25%); and out of 24 subjects with HbA1c >10%, 24 (100.0%) had diastolic dysfunction. Out of 88 subjects with duration of diabetic mellitus 0-5 years, 34 patients (38.63%); out of 64 subjects with duration of diabetic mellitus of 6-10 years, 53 patients (82.81%); out of 42 subjects with duration of diabetic mellitus 11-15 years, 38 patients (90.47%); and out of 6 subjects with duration of diabetic mellitus >15 years, 6 patients (100.0%) had diastolic dysfunction.Conclusions: Diastolic dysfunction is significantly associated with duration of disease and glycemic control assessed by HbA1c.