(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.
Press âsetâ or âprogramâ again to set a temperature. With the âwakeâ time set, you will now have to set the âwakeâ temperature. Press the respective button for your model thermostat again and the temperature will begin blinking. Use the up and down arrows to find the temperature you want.