(Redirected from LBBB). Left bundle branch block (LBBB) is a cardiac conduction abnormality seen on the electrocardiogram (ECG). In this condition, activation of the left ventricle is delayed, which causes the left ventricle to contract later than the right ventricle.
For instance, in the winter, if you set the thermostat to 20Â°C (68Â°F), it will activate the heating system when the house temperature drops below 20Â°C and will shut the system off when the house air warms up past 20Â°C. A setback thermostat contains an electronic clock.
For example, if the set point is 68ÂºF and the swing is 2Âº, the thermostat won't call for heat until the temperature reaches 66ÂºF, then it will heat until 68ÂºF and turn off. More degrees of swing is better for the efficiency.