Comparative Electromechanical and Hemodynamic Effects of Left Ventricular and Biventricular Pacing in Dyssynchronous Heart Failure Electrical Resynchronization Versus Left–Right Ventricular Interaction Joost Lumens, PHD,*y Sylvain Ploux, MD,*y Marc Strik, MD,y John Gorcsan III, MD,z Hubert Cochet, MD,* Nicolas Derval, MD,* Maria Strom, PHD,x Charu Ramanathan, PHD,x Philippe Ritter, MD,* Michel ...

Hemodynamic studies were performed before and after pericardiocentesis in 19 patients with pericardial effusion. Right atrial pressure decreases significantly, from 16 +/- 4 mm Hg (mean +/- SD) to 7 +/- 5 mm Hg in 14 patients with cardiac tamponade. This change was accompanied by significant increases in cardiac output (3.87 +/- 1.77 to 7 +/- 2.2 l/min) and inspiratory systemic arterial pulse p...

STUDY OBJECTIVES We sought to compare catheter studies using a right ventricular ejection fraction (REF) catheter together with echocardiography and MRI in patients with pulmonary hypertension. PATIENTS AND METHODS We compared hemodynamic findings, echocardiography, and MRI studies in 16 patients with pulmonary hypertension. Six healthy volunteers served as control subjects for the MRI studie...

Objectives: Right ventricular myocardial infarction as assessed by various diagnostic methods accompanies inferior wall myocardial infarction in 30% to 50% of patients. Acute right ventricular myocardial infarction is associated with higher in-hospital morbidity and mortality related to life-threatening hemodynamic compromise and arrhythmias. Since there is scarcity of literature regarding epid...

BackgroundIncreased metabolic rate of hyperglycemia in gestational diabetes causes macrosomia, which can also affect the fetal heart. The thickness of the walls of the heart and its function in women with gestational diabetes mellitus (GDM) can change over time before treatment. We aimed to evaluate fetal cardiac structure in terms of ventricular wall thickness and its function in women w...

BACKGROUND To evaluate, with different pacing modes, acute changes in left ventricular systolic function, obtained by continuous cardiac output thermodilution in various subsets of patients undergoing cardiopulmonary bypass surgery. Increments of mean arterial pressure and cardiac output were considered the end point. METHODS Fifty cases electively submitted to cardiac surgery were analyzed. ...

beneficial effects of diltiazem were followed by an associated subjective improvement over an 11-month period.’ In this report we describe a late-stage patient who sustained a significant improvement with nifedipine over a 6-month period. This improvement was associated with a significant change in hemodynamic data measured repeatedly. A white female patient (age 27 years) was admitted for eval...

Permanent pervenous atrial synchronized ventricular pacing was successfully accomplished in three patients. Atrial sensing was obtained from an electrode positioned in the coronary vein. Atrial electrograms with P waves greater than 1.5 mv were present in all three cases. Ventricular stimulation was accomplished through a separate electrode placed in the right ventricular apex. The left cephali...

Ventricular septal rupture is still a rare but often fatal complication of acute myocardial infarction. Emergent surgical closure of postinfarction ventricular septal rupture irrespective of the clinical status has been the standard treatment so far. A percutaneous approach using an occluder device is a less invasive option and allows immediate complete closure after initial hemodynamic stabili...

Background Pulmonary hypertension (PH) is a progressive disease that results in right ventricular dysfunction through increased resistive afterload and pulmonary arterial (PA) stiffening. The ventricles are connected at the interventricular sulcus, share an interlaced network of muscle fibers, and are hemodynamically dependent upon each other via the interventricular septum (IVS). Thus, the lef...