Misfiring electrical signals in the heart (ventricular or supraventricular arrhythmias) Health conditions that contribute to bradycardia include: Electrolyte imbalance Obstructive sleep apnea Hypothyroidism (underactive thyroid gland) Sick sinus syndrome and other heart problems due to atrial arrhythmias ...
To date, systematic evaluation of the effect of heart rate and preload alteration on IMP has not been performed with normal or reduced left ventricular (LV) function. We studied 14 mongrel dogs at baseline, after the induction of acute ischemic LV dysfunction, and with chronic LV dysfunction. ...
Yourheartrate is a measure of how fast your heart beats and is also an important indicator of good health. Your doctor will always make it a point to measure your heart rate whenever you visit him for your routine health checkup or any health-related problem. While the heart rate is rout...
In a normal heart, the rate of atrial contraction is the same as the rate of ventricular contraction. At rest, the frequency of the discharges originating from the SA node is low, and the heart beats at the lower range of normal (60 to 80 beats/minute). During exercise or excitement, ...
To diagnose heart failure with preserved ejection fraction (HFpEF), the following three criteria have to be fulfilled [1–8]: 1. Signs and symptoms generally present in heart failure, and 2. Preserved left ventricular ejection fraction, defined as LV-EF ≥ 50%, in the presence of a nor...
Tachycardia refers to the condition of having an abnormally fast heart rate that exceeds 100 beats per minute. Learn about the definitions of tachycardia, supraventricular tachycardia (SVT), and ventricular tachycardia; explore the d...
LeGrice IJ, BH Smaill, LZ Chai, SG Edgar, JB Gavin, PJ Hunter (1995) Laminar structure of the heart: ventricular myocyte arrangement and connective tissue architecture in the dog. Am J Physiol 269: H571–H582. Google Scholar Lew WYW, MM LeWinter (1986) Regional comparison of midwall se...
The ECG does not directly depict abnormalities in cardiac structure such as ventricular septal defects and abnormalities of the heart valves. It only records the electrical changes produced by structural defects. In some patients, however, the clinician can infer a specific structural diagnosis such as...
PFR peak filling rate PKG protein kinase G TDI tissue Doppler imaging TIMP tissue inhibitors of matrix metalloproteinase As a result of modern evidence-based heart failure (HF) therapy, the prognosis of patients with heart failure with reduced left ventricular ejection fraction (HFREF) improved progre...
•左心室射血分数正常(heartfailurewithnormal leftventricularejectionfraction,HFNEF) •左心室射血分数尚保留的心力衰竭(heart failurewithpreservedleftventricularejection fraction,HFPEF) >2005年,ESC/ACC/AHA •舒张功能不全不是孤立存在的,而是从舒张功能 ...