Introduction The Autonomic Nervous System (ANS) is a complex network of nerves and ganglia which work to regulate a variety of sensory and motor systems without conscious effort (Berntson 2006). It is separated into two branches, the sympathetic and parasympathetic nervous systems. These two branches have very clear points of […]
All About Cardiac Impedance Part 1: Introduction to Cardiac Impedance
All About Cardiac Impedance Cardiac impedance is a measurement of the mechanical activation of the heart. By recording cardiac impedance in conjunction with the electrical activation of the heart, the electrocardiogram (ECG), we can gain insight into sympathetic nervous system influence through measures such as Pre-Ejection Period, Stroke Volume, and Cardiac […]
All About ECG Part 5: Identifying and Handling Cardiac Arrhythmia
As we continue our series on the ECG signal, we need to look at abnormal ECG signals and how to handle them in analysis. Diagnosis of specific conditions is best left to cardiologists and so we are not going to get deep into the identification of specific cardiac conditions (if you […]