The Hidden Value of Assessing Right Ventricular Performance with Exercise in Hypertensive Patients with Left Ventricular Diastolic Dysfunction

Background: Right ventricular (RV) dysfunction could develop during exercise in patients with both hypertension and left ventricular diastolic dysfunction and may contribute to the patient symptoms. The objective is to assess RV function, both at rest and during exercise in patients with hypertension and left ventricular diastolic dysfunction. Methods: We included 30 patients with hypertension and resting LV diastolic dysfunction. The systolic function of the right ventricle was assessed by TAPSE (Tricuspid Annular Plane Systolic Excursion) and S, while E/A ratio, annular lateral E’, E/E’ and E’/A’ were used to measure diastolic function. The global function of the right ventricle was assessed by measuring the right indexed myocardial performance. The dimensions and pulmonary pressures were also measured. Results: The following parameters of RV systolic function were increased significantly with exercise: TAPSE (P = 0.0054), S’ (P = 0.0045). Moreover, the following diastolic parameters of the RV increased significantly with exercise: E/E’ (P = 0.05), A’ (P = 0.04). The global RV function showed also a significant increase (P = 0.0011). The three RV dimensions as well as the pulmonary artery pressures also increased during exercise (P = 0.000004, 0.001, and 0.00000064 respectively). In addition, the presence of resting LV grade II DD predicted significantly higher pulmonary pressures during exercise (P = 0.006). The advanced resting grade of LVDD predicted significantly the presence of advanced grade of RVDD with exercise (P = 0.037). Conclusions: Some patients who have both hypertension and LV diastolic dysfunction showed structural and functional changes of the right ventricle at rest. However, all patients had RV functional changes during exercise.

Study of Bradyarrhythmias in Acute Myocardial Infarction

Background: Arrhythmias after acute myocardial infarction are common. Bradyarrhythmias need specific insight into when and how to treat them. Objectives: To delineate the incidence, course, and management of different types of bradyarrhythmias after acute myocardial infarction, the study period was five years. Methods: 453 patients with Acute Myocardial Infarction (AMI) were admitted to intensive care in five years. ECGs were analyzed for the presence of bradyarrhythmias and details of management. Results: 65 patients with bradycardia were found. Sinus bradycardia in 40, sick sinus syndrome in 10, junctional rhythm in 10, second-degree block in 10, complete heart block in 24. We divided patients with sinus bradycardia into a stable group and an unstable group. Unstable sinus bradycardia is more prevalent in cases with hypotension or shock, slower heart rates, gross or transmural infarction. Also, predictors of instability were changeable morphology of the “P” wave and inferior rather than anterior infarction. The indications and danger of atropine are defined. Complete heart block was found in 24 patients (0.053%). 13 were managed by drug therapy (isoprenaline, corticosteroids, and atropine);Eleven patients were paced. 14 out of the 24 patients died (58%), the total mortality rate among the 453 patients was 22%. The prognostic factors of CHB were defined. Techniques of introduction of the lead in RV without fluoroscopy are described. Conclusions: Sinus bradycardia in AMI is accompanied by a lower incidence of mortality. Atropine is not a safe drug to be given as routine. Complete heart block predictors of mortality are the association with heart failure, early-onset, and persistence of the block.

Evaluation of D-Dimer as a Diagnostic Tool in Patients with Acute Aortic Dissection

Acute (Ac.) Aortic Dissection (AD) is a life threatening cardiovascular emergency. The diagnostic methods (e.g., TEE, MRI, Multislice CT) are limited by availability. A fast, cost effective and technically simple method for diagnosis of AAD is needed. D-Dimer is a measure of clot formation and lysis. The aim of this study was to determine whether assessing D-Dimer level can be used for the diagnosis of AAD. Methods: 45 patients with clinical suspicion of AAD who presented within the first 24 hours from symptom onset were studied prospectively. 20 patients were proved to have AAD by TEE (group I). The other 25 patients had other final diagnosis (group II). All the 20 patients in group I (100%) with confirmed AAD had positive and elevated D-Dimer levels while only 9 patients in group II (36%) had positive D-Dimer levels (p < 0.001). Mean D-Dimer level was significantly higher in the 20 patients in group I than in the 9 patients with positive test in group II (p < 0.01). The sensitivity of D-Dimer was 100% and the specificity was 64% for the diagnosis of AAD. Mean D-Dimer level was significantly higher in Stanford type A, AAD than in Stanford type B, AAD, (p < 0.01). 5 patients (25%) died during the in–hospital course. Mean D-Dimer level was higher in the patients who died. Conclusion: D-Dimer levels are positive and elevated in all the patients with AAD presenting within the first 24 hours from symptom onset.

Case Report: Intracardiac Mass, the Importance of Early Diagnosis and Surgical Intervention

Background: Cardiac masses are not rare findings;they can be primary or secondary. The differential diagnosis may need surgical intervention in most cases. Case summary: A 42-year female presented with complaints of dyspnea, palpitations, ventricular premature beats, attacks of non-sustained ventricular tachycardia. Echocardiography revealed a myocardial septal mass on both sides in the right and left ventricles. The decision to operate was taken and the masses were removed. It was proved by histopathologic examination to be metastatic from her skin melanoma. Clinically, arrhythmias subsided. Conclusion: The decision of surgery proved unavoidable. Early diagnosis by surgical intervention is important for effective treatment.