Patrick Sullivan Introduction to Parallel Conductance in Cardiac Physiology In the world of cardiovascular research, accurate measurement of left ventricular volume is critical for understanding cardiac function. One of the most widely used tools is the conductance catheter, which provides real-time pressure-volume (PV) loop data. However, the raw signals obtained aren’t always reliable due to interference from … Read more
Introduction to Real Time Ventricular Volume The heart is one of the most vital organs in the human body, tirelessly pumping blood to sustain life. Among the many parameters used to evaluate its function, ventricular volume plays a pivotal role. Traditionally, cardiologists have relied on static imaging techniques and periodic measurements to estimate these volumes. … Read more
The human heart is a complex, dynamic organ that functions tirelessly to pump blood throughout the body. One of the key concepts in understanding cardiac performance is afterload dependent mechanical work—a term that blends mechanical engineering principles with cardiovascular physiology. In simple terms, this refers to the amount of mechanical effort the heart must exert … Read more
Introduction to Cardiac Mechanics The human heart is not just a pump—it’s a powerful biomechanical engine. With each beat, it consumes energy to contract, relax, and move blood throughout the body. This energy isn’t just a number; it reflects how healthy the heart is, how hard it’s working, and whether it’s operating efficiently. But when … Read more
Introduction to Cardiac Mechanics The human heart operates through a sophisticated balance of pressure, volume, and timing. These dynamics ensure efficient blood flow, oxygen delivery, and organ perfusion. Three key elements govern cardiac function: preload, afterload, and contractility. Understanding how these parameters interact is crucial for both diagnosis and therapy in cardiac care. What is … Read more
Understanding the End Systolic Pressure Volume Relationship (ESPVR) The end systolic pressure volume relationship (ESPVR) is a fundamental concept in cardiovascular physiology that defines the relationship between pressure and volume in the heart at the end of systole, or heart contraction. Often hailed as a load-independent measure of myocardial contractility, ESPVR provides clinicians and researchers … Read more
Understanding Preload Recruitable Stroke Work (PRSW) Preload recruitable stroke work (PRSW) is a sophisticated, load-independent measurement used in cardiovascular physiology to assess the contractility of the heart. Unlike traditional methods such as ejection fraction (EF), PRSW gives a more precise and reliable estimation of how efficiently the heart muscle is functioning, especially in critically ill … Read more
Introduction to PV Loop Monitoring Left ventricle PV loop monitoring is one of the most precise methods available to assess the dynamic relationship between pressure and volume within the left ventricle of the heart. These loops offer critical insights into both systolic and diastolic function, providing clinicians and researchers with a comprehensive snapshot of cardiac … Read more
Introduction to Pressure-Volume (PV) Loops Pressure-volume (PV) loops are powerful graphical tools used to analyze cardiac function in real time. These loops reflect the dynamic relationship between pressure and volume within the heart’s ventricles throughout the cardiac cycle. PV loop monitoring is a cornerstone in advanced cardiovascular diagnostics, particularly for evaluating left and right ventricular … Read more
Cardiac performance monitoring has evolved tremendously over the last decade, and at the heart of this innovation lies the BiV Sigma M PV Loop System—a revolutionary tool designed to provide real-time, high-resolution pressure-volume data from both ventricles simultaneously. Whether you’re a cardiologist, researcher, or biomedical engineer, understanding the power of this system is essential for … Read more