Murmurs of heart indicate a structural defect either valve defects or any cavity s enlargement. It depends on which pacemaker was put in your husband s heart. The type of murmur the doctor heard with his stethoscope will point to the seriousness and possibility of the consequences . What Is a Pacemaker? A pacemaker is a small device that s placed in the chest or abdomen to help control abnormal heart rhythms. This device uses electrical pulses to prompt the heart to beat at a normal rate. Pacemakers are used to treat arrhythmias (ah-RITH-me-ahs). Arrhythmias are problems with the rate or rhythm of the heartbeat. During an arrhythmia, the heart can beat too fast, too slow, or with an irregular rhythm. A heartbeat that s too fast is called tachycardia (TAK-ih-KAR-de-ah). A heartbeat that s too slow is called bradycardia (bray-de-KAR-de-ah). During an arrhythmia, the heart may not be able to pump enough blood to the body. This can cause symptoms such as fatigue (tiredness), shortness of breath, or fainting. Severe arrhythmias can damage the body s vital organs and may even cause loss of consciousness or death. A pacemaker can relieve some arrhythmia symptoms, such as fatigue and fainting. A pacemaker also can help a person who has abnormal heart rhythms resume a more active lifestyle. Since the structural defect that is indicated by the murmur most probably will be the reason why the pacemaker was needed, I think there s little evidence to worry. I think if you indicate the type of structural defect the doctor has written as the diagnosis, it will be of more help to predict any consequences in future. I hope this helps.