By the start of the twentieth century, Germany and the United States had challenged some of Britain's economic lead. Subsequent military and economic tensions between Britain and Germany were major causes of the First World War, during which Britain relied heavily upon its empire.he British Empire comprised the dominions, colonies, protectorates, mandates and other territories ruled or administered by the United Kingdom.
A heart murmur is an extra or unusual sound heard during a heartbeat. Murmurs range from very faint to very loud. Sometimes they sound like a whooshing or swishing noise. Normal heartbeats make a lub-DUPP or lub-DUB sound.This is the sound of the heart valves closing as blood moves through the heart.Doctors can hear these sounds and heart murmurs using a stethoscope.ometimes they sound like a whooshing or swishing noise. Normal heartbeats make a lub-DUPP or lub-DUB sound. This is the sound of the heart valves closing as blood moves through the heart. Doctors can hear these sounds and heart murmurs using a stethoscope.
Holter Monitor. A Holter monitor is a device that continuously records your heartâs rhythm during daily activities (usually for 24 hours). This is also called an ambulatory electrocardiogram. The monitor records your heartâs rhythm through electrodes that are placed on your chest.Electrodes are small adheive patches attached by wires to a monitor. This test helps show how your heart responds to normal activity or to certain medications.his is also called an ambulatory electrocardiogram. The monitor records your heartâs rhythm through electrodes that are placed on your chest. Electrodes are small adheive patches attached by wires to a monitor.