Signs and symptoms
The warning signs of early speech delay are categorized into age-related milestones, beginning at the age of 12 months and continuing through early adolescence.At the age of 12 months, there is cause for concern if the child is not able to do the following:

Using gestures such as waving good-bye and pointing at objects
Practicing the use of several different consonant sounds
Vocalizing or communicating needsBetween the ages of 15 and 18 months children are at a higher risk for speech delay if they are displaying the following:

Not saying "momma" and "dada"
Not reciprocating when told "no", "hello", and "bye"
Does not have a one to three word vocabulary at 12 months and up to 15 words by 18 months
Is unable to identify body parts
Displaying difficulties imitating sounds and actions
Shows preference to gestures over verbalizationAdditional signs of speech delay after the age of 2 years and up to the age of 4 include the following:

Inability to spontaneously produce words and phrases
Inability to follow simple directions and commands
Cannot make two word connections
Lacks consonant sounds at the beginning or end of words
Is difficult to understand by close family members
Is not able to display the tasks of common household objects
Is unable to form simple 2 to 3 word sentences

Effects
Studies show that children diagnosed with speech delay are more likely to present with behavioral and social emotional problems both in childhood and as adults. Decreased receptive language, reading, and learning skills are common side effects for children that have a speech delay and do not receive adequate intervention.
A more complete definition is that ventricular fibrillation is a "turbulent, disorganized electrical activity of the heart in such a way that the recorded electrocardiographic deflections continuously change in shape, magnitude and direction".Ventricular fibrillation most commonly occurs within diseased hearts, and, in the vast majority of cases, is a manifestation of underlying ischemic heart disease. Ventricular fibrillation is also seen in those with cardiomyopathy, myocarditis, and other heart pathologies. In addition, it is seen with electrolyte imbalance, overdoses of cardiotoxic drugs, and following near drowning or major trauma. It is also notable that ventricular fibrillation occurs where there is no discernible heart pathology or other evident cause, the so-called idiopathic ventricular fibrillation.Idiopathic ventricular fibrillation occurs with a reputed incidence of approximately 1% of all cases of out-of-hospital arrest, as well as 3–9% of the cases of ventricular fibrillation unrelated to myocardial infarction, and 14% of all ventricular fibrillation resuscitations in patients under the age of 40. It follows then that, on the basis of the fact that ventricular fibrillation itself is common, idiopathic ventricular fibrillation accounts for an appreciable mortality. Recently described syndromes such as the Brugada Syndrome may give clues to the underlying mechanism of ventricular arrhythmias.