Cardiologist Serving Katy, Sugar Land, Greater Houston
Find out whether your breathing symptoms may be related to your heart.
Shortness of breath can make everyday activities—walking through a store, climbing stairs, getting dressed, exercising or lying down—feel unusually difficult. Some people describe it as not getting enough air, needing to work harder to breathe, chest tightness or becoming winded much sooner than expected.
Shortness of breath, also called dyspnea, can have many possible causes. It may be related to the heart, lungs, circulation, blood, physical conditioning, medication or another medical condition. Because the symptom alone cannot identify the cause, persistent, unexplained or worsening breathlessness deserves medical evaluation.
At Advanced Cardiology, Adnan Khalid, MD, evaluates adults whose breathing symptoms may be related to heart failure, coronary artery disease, an irregular heartbeat, heart-valve disease, cardiomyopathy, high blood pressure or pulmonary hypertension. When testing suggests that the cause may not be cardiovascular, appropriate coordination with primary-care, pulmonary or other specialists may be recommended.
Dr. Khalid reviews your symptoms, history and test results himself
Visits in Katy and Sugar Land
Catheter and device procedures at an affiliated hospital
Office follow-up on medicines and risk factors
Cardiovascular Conditions Linked to Breathing Difficulty
Shortness of breath can be a heart-attack symptom with or without chest discomfort. Sudden breathlessness accompanied by pain with breathing, coughing blood, fainting or a rapid heartbeat can also occur with a pulmonary embolism, which is a blood clot in the lungs.
Call 911 right away if shortness of breath is sudden, severe or rapidly worsening, or if it occurs with any of the following, even if the symptoms ease or go away:
Do not submit an online appointment request and wait for a response during a possible emergency. Emergency medical services can begin evaluation and treatment while arranging transport to the hospital.
Adnan Khalid, MD – Interventional Cardiologist
Adnan Khalid, MD is a board-certified cardiologist with over 10 years of experience in diagnosing and treating heart conditions such as coronary artery disease, peripheral artery disease, heart failure, hypertension, arrhythmias, and hyperlipidemia. He is fellowship-trained in Cardiovascular Disease, Interventional Cardiology, Advanced Heart Failure, and Transplant Cardiology.
Dr. Khalid graduated from Nishtar Medical College among the top students in his class and completed his residency and fellowship at the University of Missouri–Kansas City. He is known for providing personalized, compassionate care and takes time to understand each patient’s concerns.
Outside of work, Dr. Khalid enjoys reading, traveling, exercising, and spending time with his wife and three children.
Board Certifications:
American Board of Internal Medicine
Cardiovascular Disease | Interventional Cardiology | Advanced Heart Failure & Transplant Cardiology
Shortness of breath affects people differently. You may experience:
The pattern matters. Symptoms that occur only with strenuous exercise may have a different explanation than symptoms appearing during routine activity, while resting or while lying down.
Breathing difficulty when lying flat is called orthopnea. Waking suddenly at night feeling short of breath is often described as paroxysmal nocturnal dyspnea. Both patterns may occur with heart failure, although they can have other causes and require clinical evaluation.
A cardiology evaluation may be appropriate when breathlessness is new, unexplained, recurring or progressively limiting your activities.
Consider requesting an appointment when you notice:
You may also benefit from evaluation when you have cardiovascular risk factors such as high blood pressure, diabetes, high cholesterol, tobacco use, kidney disease or a strong family history of heart disease.
Stable symptoms can generally be evaluated through a scheduled visit. Sudden, severe or rapidly worsening symptoms require emergency care rather than an outpatient appointment.
Yes. The heart and lungs work together to circulate oxygen throughout the body. A problem affecting heart pumping, filling, blood flow, rhythm or valves can make normal activity feel more difficult.
However, shortness of breath is not specific to heart disease. It should not be assumed to be cardiac until a qualified clinician evaluates the symptoms, examination findings and test results.
Heart failure may cause blood and fluid to back up toward the lungs, leading to breathlessness during activity, at rest, while lying flat or during the night. Patients may also experience swelling, rapid weight changes, fatigue, cough or reduced exercise tolerance.
Narrowed coronary arteries may reduce blood flow to the heart muscle. Some patients experience chest pressure, but others may notice shortness of breath, fatigue, nausea or reduced exercise tolerance. Breathlessness can sometimes function as an anginal equivalent, particularly when it occurs predictably during physical effort.
A heart rate that is too fast, too slow or irregular can affect how efficiently the heart fills and pumps. Some patients experience shortness of breath together with palpitations, weakness, chest discomfort, dizziness or fainting.
A narrowed or leaking heart valve may interfere with normal forward blood flow. Symptoms can include exertional breathlessness, fatigue, swelling, chest discomfort, dizziness or fainting. An echocardiogram is commonly used to assess heart-valve structure and blood flow.
Cardiomyopathy affects the heart muscle. Depending on the type, it can weaken the heart, make the muscle abnormally thick or interfere with normal filling. Symptoms may include breathlessness, fatigue, swelling, palpitations or fainting.
Long-standing or poorly controlled high blood pressure can place additional strain on the heart. Over time, it may contribute to heart-muscle thickening, impaired filling, coronary disease or heart failure.
Pulmonary hypertension is elevated pressure in blood vessels that carry blood through the lungs. It can make the right side of the heart work harder and may cause shortness of breath, fatigue, chest discomfort, swelling, lightheadedness or fainting.
Many noncardiac conditions can cause or contribute to breathing difficulty, including:
Some patients have more than one cause. For example, a person may have both heart disease and a chronic lung condition. Anemia, kidney disease or deconditioning may also make an existing cardiovascular condition feel worse.
Anxiety can produce rapid breathing, chest tightness and the sensation of not getting enough air, but patients should not automatically attribute new or severe symptoms to anxiety without appropriate medical evaluation. Heart and lung diseases can produce similar sensations.
If the evaluation points primarily toward a pulmonary or another noncardiac condition, Advanced Cardiology may recommend follow-up with the appropriate clinician rather than continuing unnecessary cardiac testing.
Becoming mildly winded during strenuous exercise can be normal. Becoming short of breath during routine, age-appropriate activity—particularly when the change is new or worsening—may deserve evaluation.
Examples include:
The clinician will consider your previous activity level, age, medical history, current medications and how quickly the change developed. Symptoms associated with ordinary activity can occur with heart failure and several lung conditions.
Difficulty breathing while flat may cause a person to sleep with several pillows or in a recliner. Other patients fall asleep comfortably but awaken suddenly feeling unable to catch their breath.
These symptoms can occur when changes in body position increase blood return to the heart and contribute to congestion in a person with heart failure. They can also be associated with lung disease, sleep apnea, obesity and other conditions.
Tell your cardiologist:
New or worsening nighttime breathlessness should not be ignored. Severe symptoms require urgent or emergency evaluation.
Breathlessness accompanied by chest pressure, squeezing, fullness or pain may indicate a cardiovascular emergency, especially when symptoms are sudden, severe or accompanied by sweating, nausea, weakness or lightheadedness.
Heart-attack symptoms vary, and shortness of breath can occur with or without obvious chest discomfort. Call 911 when symptoms may represent a heart attack.
Stable, recurring symptoms that have already been medically assessed may still require cardiology follow-up to determine whether coronary artery disease, valve disease, heart failure or another cardiovascular problem is contributing.
A fast, pounding, fluttering, skipped or irregular heartbeat can occur together with breathlessness. Potential explanations include:
An office EKG records the rhythm at a single point in time. When symptoms come and go, a Holter monitor, event monitor or mobile cardiac telemetry device may be considered to record the rhythm over a longer period.
A useful evaluation begins with the details of the symptoms rather than automatically ordering every available heart test.
Dr. Khalid may ask:
The timing and pattern may help narrow the possible causes.
The evaluation may include:
A normal office examination does not automatically exclude every cardiac or pulmonary condition. Further evaluation depends on the overall clinical picture.
Not every patient needs every test. Testing should be chosen according to the symptoms, physical findings, medical history and results already available.
An EKG or ECG, performed in our office, records the heart’s electrical activity. It may reveal:
An EKG can be normal even when a person has intermittent rhythm symptoms or certain forms of coronary disease.
An echocardiogram uses ultrasound to evaluate the heart’s structure and function. It may assess:
Echocardiography is commonly used when symptoms may be related to heart failure, valve disease, cardiomyopathy or pulmonary hypertension.
Depending on the clinical situation, testing may include:
BNP and NT-proBNP can provide information about cardiac stress and may help support or make heart failure less likely, but these tests must be interpreted with the patient’s age, kidney function, body size, rhythm and other clinical findings. They do not replace the history, examination and imaging.
Exercise or medication-based stress testing may be considered when symptoms appear with exertion and coronary disease is a concern. The appropriate type depends on the patient’s ability to exercise, baseline EKG, medical history and previous test results.
A normal stress test does not explain every form of breathlessness, and testing should be selected rather than ordered routinely.
A Holter monitor, event monitor or mobile cardiac telemetry device, performed or arranged by our office, may be considered when breathlessness occurs with intermittent palpitations, racing heartbeat, dizziness or fainting.
A chest X-ray, chest CT scan, pulmonary-function testing or another lung evaluation may be ordered or coordinated when symptoms suggest pneumonia, COPD, interstitial lung disease, a pleural condition, pulmonary embolism or another noncardiac explanation. Chest CT can help evaluate certain causes of breathlessness, including lung disease, fluid around the lungs and pneumonia.
Selected patients may need coronary CT angiography, nuclear imaging, cardiac MRI or cardiac catheterization. These tests should be recommended only when the patient’s symptoms, risk level and preliminary findings support the need.
Some of these tests are performed at an imaging center or hospital rather than in the office, and cardiac catheterization is always done in a hospital. Our office will explain where your test is scheduled.
Treatment is based on the identified or suspected cause—not simply on the symptom of shortness of breath.
The plan for heart failure may involve:
The plan may include:
Treatment depends on the rhythm and may involve:
Care may include periodic echocardiography, symptom monitoring, medication for associated conditions or referral for surgical or catheter-based treatment when the valve disease becomes significant.
Treatment may focus on obtaining accurate readings, reviewing current medication, addressing cardiovascular risk and evaluating whether hypertension has affected heart structure or function.
Dr. Khalid may recommend follow-up with:
If you also feel dizzy or lightheaded, see our page on dizziness and shortness of breath. Good care sometimes means confirming that the heart is not the main source and directing the patient to the clinician best positioned to continue the evaluation.
The practice currently describes Adnan Khalid, MD, as board-certified and fellowship-trained in cardiovascular disease, interventional cardiology, and advanced heart failure and transplant cardiology.
The goal is not merely to label the symptom. The evaluation considers whether heart pumping, rhythm, valves, coronary circulation, blood pressure or pulmonary vascular pressure may be contributing.
Advanced Cardiology also evaluates conditions commonly associated with breathlessness, including:
Testing is based on your symptoms, risk factors, examination and previous results. Not every patient receives the same set of tests.
Patients can request appointments at the practice’s Katy or Sugar Land office.
Advanced Cardiology provides cardiovascular evaluation for patients experiencing unexplained or persistent breathlessness at its Katy office.
Advanced Cardiology — Katy
410 W Grand Pkwy S Suite 4D, Katy, TX 77494
Phone: 713-258-6111
The Katy location serves patients from Katy and surrounding West Houston and Fort Bend communities. Call before your visit to confirm office hours, insurance coverage and whether a particular test is offered at this location.
Advanced Cardiology also evaluates cardiovascular causes of shortness of breath at its Sugar Land office.
Advanced Cardiology — Sugar Land
7102 Tarrington Ave, Suite 505, Sugar Land, TX 77479
Phone: 713-258-6111
The Sugar Land location serves patients from Sugar Land and surrounding Fort Bend communities. Call to confirm office hours, insurance coverage and test availability.
Advanced Cardiology in Sugar Land evaluates and manages a broad range of heart and blood vessel conditions, following current evidence-based guidelines.
Led by Adnan Khalid, MD, our team is committed to delivering personalized treatment plans, advanced diagnostic services, and patient-centered care. We take time to understand each patient’s health concerns and work closely with them to improve their heart health and overall well-being.
We diagnose and treat heart and blood vessel conditions, including coronary artery disease, heart rhythm disorders, heart failure, and high blood pressure.
Adil Ahmed- Reviewed in Google
Yenifer is an exceptional nurse who provides compassionate and personalized care to all patients. Her kindness, empathy, and professionalism make a significant difference in the clinic. I highly recommend Yenifer and Dr Adnan Khalid for their outstanding heart health care and support.
Dr. Khalid helped my dad, Harvey, immediately without question. My dad had to have a procedure done immediately after arriving to the ER and he was there without right away to pretty much save his life. We are forever grateful for him.
Very excellent dr. Definitely recommend him for any heart issues. Compassionate and you can tell he really loves his job and cares about the patient. Very glad we found him. Staff is very friendly and the know who you are as soon as you walk in.
Our goal is to help patients live healthier lives through expert cardiovascular care, modern treatment options, and a supportive healthcare environment.
Please print out your paperwork and bring it to your appointment at Advanced Cardiology, Sugar Land. If your insurance requires authorization, please be sure to have that information sent to our office or bring it with you to your appointment, along with any medical records you may have. Please also make sure to bring your insurance cards, photo ID, and medication list.
Thank you, and we look forward to meeting you! Contact us today with any questions.
Please note: chest pain or pressure, shortness of breath, or sudden numbness or weakness can be signs of a heart attack or stroke. Call 911 right away. Appointment requests are not for emergencies.
Most insurance plans accepted
(713) 258-6111
The correct starting point depends on the symptom pattern and medical history. A primary-care clinician can assess many general causes. A cardiologist may be appropriate when breathlessness occurs with chest discomfort, palpitations, swelling, fainting, cardiovascular risk factors or known heart disease. A pulmonologist focuses on lung and airway conditions.
Sudden or severe breathlessness should be evaluated as an emergency rather than through a routine specialist appointment.
Yes. Heart failure, valve disease, cardiomyopathy, pulmonary hypertension, rhythm disorders and coronary disease can cause breathlessness without classic chest pain. Shortness of breath can also occur as a heart-attack symptom with or without chest discomfort.
Symptoms alone often cannot reliably distinguish a heart cause from a lung cause. The clinician considers when symptoms occur, associated symptoms, risk factors, examination findings and appropriate testing. Some patients have both cardiovascular and pulmonary conditions.
Becoming winded during strenuous activity may be normal, particularly after inactivity. A new decline, breathlessness during routine activity, or symptoms accompanied by chest discomfort, palpitations, dizziness or swelling should be evaluated.
Breathing difficulty while flat may occur with heart failure because of fluid congestion, but it can also be associated with lung disease, sleep apnea, obesity and other conditions. New or worsening symptoms should be reported to a healthcare professional.
Anxiety and panic symptoms can cause rapid breathing, chest tightness and a feeling of not getting enough air. However, new, severe or unexplained symptoms should not automatically be attributed to anxiety because cardiovascular and pulmonary conditions can feel similar.
High blood pressure may contribute indirectly by placing strain on the heart and increasing the risk of heart failure, coronary disease and heart-muscle changes. Call 911 for sudden breathlessness with a very high blood-pressure reading, chest pain or stroke-like symptoms.
Yes. Some patients with reduced coronary blood flow experience breathlessness or fatigue during exertion rather than obvious chest pain. The need for stress testing or coronary imaging depends on the complete clinical picture.
Testing may include an EKG, echocardiogram, blood tests, stress testing or rhythm monitoring. Some patients need chest imaging, coronary imaging or pulmonary evaluation. Not every test is necessary for every patient.
Yes. Some people with heart failure have difficulty breathing while lying flat or awaken during the night feeling breathless. These symptoms can occur when congestion affects the lungs. They can also have noncardiac causes, so evaluation is needed.
It can be. Pulmonary embolism symptoms may include sudden difficulty breathing, chest pain that is worse with a deep breath or cough, a rapid heartbeat, coughing blood, lightheadedness or fainting. Call 911 if these symptoms occur.
Call 911 when breathlessness is sudden, severe or rapidly worsening, particularly when it occurs with chest pressure or pain, fainting, confusion, blue or gray lips, coughing blood, severe weakness or other alarming symptoms.
Call Advanced Cardiology at 713-258-6111 or use the online appointment-request form. Select the Katy or Sugar Land office. Do not use the form during an emergency.
Persistent or worsening shortness of breath should not simply be dismissed as age, stress or poor conditioning. A cardiovascular evaluation can help determine whether heart failure, coronary disease, an abnormal rhythm, valve disease, high blood pressure or another heart-related condition may be contributing.
Advanced Cardiology provides personalized evaluation for patients in Katy, Sugar Land and nearby communities.
Call 713-258-6111 to request an appointment with Adnan Khalid, MD.
410 W Grand Pkwy S, Suite 4D, Katy, TX 77494
7102 Tarrington Ave, Suite 505, Sugar Land, TX 77479
Emergency reminder: Call 911 for sudden or severe breathing difficulty, chest pressure, fainting, confusion, blue or gray lips, coughing blood or other potentially life-threatening symptoms.
Sources: MedlinePlus: Breathing Problems · NHLBI: Heart Failure · NHLBI: Heart Tests · American Heart Association: Warning Signs of a Heart Attack
Signs of blocked heart arteries include chest pressure with exertion, breathlessness and fatigue. Learn the warning signs, risk factors, tests and treatment.
Sudden high blood pressure can come from stress, pain, caffeine, missed pills or decongestants. Learn when 180/120 is an emergency and how to prevent spikes.
Skipped heartbeats are usually premature beats (PACs or PVCs) triggered by caffeine, stress or poor sleep. Learn when they are harmless and when to get checked.
Anxiety can cause chest pain and a pounding heart, but so can heart problems. Learn how they differ, how doctors rule out heart causes and when to call 911.
Early signs of heart failure include breathlessness, fatigue, ankle swelling and rapid weight gain. Learn the symptoms, risk factors and how it is diagnosed.
A suddenly racing heart is often stress, caffeine or dehydration, but can be SVT or atrial fibrillation. Learn the causes, warning signs and when to call 911.
Katy & Sugar Land Cardiologist
Advanced Cardiology welcomes new patients at its offices in Katy and Sugar Land. Call our office or send an appointment request, and our staff will follow up.
Most major insurance plans accepted; coverage is verified individually.
For possible heart attack or stroke symptoms, call 911.
